Are You Feeling “Off” and Don’t Know Why? It Could Be Your Thyroid
One thing I see happen over and over again with women in perimenopause is this:
They feel terrible
Exhausted
Foggy headed
Anxious
Puffy
Depressed
And like their body is falling apart. They go to the doctor, get basic labs run, and hear:
“Everything looks normal.”
Meanwhile, they know something feels very wrong.
Today, I want to talk about something that often gets completely overlooked in women over 40:
the thyroid.
This topic is very personal for me.
My Thyroid Story Started at 21
I want to take you back to 1997. I was 21 years old, a full-time college student, working part-time, and my parents were going through a really ugly divorce after 26 years of marriage.
It was one of the hardest seasons of my life.
I remember gaining a lot of weight during that time and looking incredibly puffy in photos. My face looked swollen. I felt depressed, exhausted, and emotionally drained, and I just chalked it up to stress and heartbreak from everything happening with my family.
And to be honest, I wasn’t taking care of myself at all.
I was:
eating fast food constantly
barely sleeping
drinking a lot
stressed all the time
emotionally overwhelmed
At the time, I thought: “Well of course I feel terrible. My life is a mess right now.”
But then something happened that scared me.
The Symptom That Changed Everything
I started having discharge from my breasts. It was like I was lactating. 😬
And no, I was not pregnant.
I remember being completely mortified and terrified because I felt like my body was doing something that made absolutely no sense.
I went to my doctor and explained what was happening, and he immediately suspected thyroid issues.
Sure enough, after testing, I was diagnosed with hypothyroidism.
And suddenly everything made more sense:
the weight gain
the puffiness
the depression
the exhaustion
even the lactation symptoms
I was later told by an endocrinologist that my thyroid levels were so low that if I had been 40 years old instead of 21, I probably wouldn’t have been able to get out of bed.
What Nobody Talked to Me About
The medication helped, and I began to feel better. I lost weight, the puffiness improved, and my symptoms calmed down. The lactation stopped. 🤪
But here’s the thing… not one doctor talked to me about lifestyle.
Nobody talked to me about managing my stress, how much alcohol I was drinking, the food I was eating, or how poorly I was sleeping. No one explained how deeply the thyroid is connected to chronic stress, nervous system overload, inflammation, and lifestyle habits, or how much those things can affect how we feel physically and emotionally.
And our thyroid is incredibly sensitive to stress.
Why Thyroid Issues Get Missed in Perimenopause
This is where things get very confusing for women.
The symptoms of thyroid dysfunction and perimenopause overlap almost perfectly.
Things like:
fatigue
brain fog
weight gain
anxiety
depression
poor sleep
thinning hair
feeling cold
low motivation
can all look like “just hormones.” And sometimes the thyroid isn’t even evaluated properly.
Your Thyroid Is Your Metabolic Control Center
Your thyroid impacts nearly every system in your body, which is why even small changes in thyroid function can make you feel very “off.”
It plays a major role in your energy levels, mood, metabolism, brain function, digestion, stress tolerance, hair and skin health, and even your body temperature.
When your thyroid is not functioning optimally, you may feel exhausted, mentally foggy, emotionally overwhelmed, constipated, cold all the time, notice thinning hair or dry skin, and feel like your body just isn’t responding the way it used to.
So even if it’s “slightly” off, you will feel it.
And when you layer fluctuating perimenopause hormones on top of thyroid dysfunction?
Women can feel absolutely miserable.
Why Stress Matters So Much
One of the biggest things I’ve learned over the years is that high stress absolutely impacts thyroid function.
And in perimenopause, your body becomes much more sensitive to stress. Your stress tolerance often drops, and inflammation in the body can rise. Cortisol, your stress hormone, tends to increase, and blood sugar becomes more unstable, and sleep often worsens. When all of these things are happening at the same time, it can leave women feeling exhausted, emotionally overwhelmed, anxious, mentally foggy, and unlike themselves.
All of those things impact the thyroid.
It’s all connected.
“Your Labs Are Normal”
Let’s talk about one of the most frustrating things women hear at the doctor’s office:
“Your thyroid labs look normal.”
Most conventional providers only run one thyroid marker:
TSH (thyroid-stimulating hormone).
But TSH is just one small piece of the picture.
It does not tell you:
How well thyroid hormone is converting
How your cells are using it
Whether stress is interfering
or whether autoimmune thyroid issues are happening
So yes, you can absolutely have “normal” labs and still feel awful.
Normal vs. Optimal Are Not the Same Thing
This is one area where functional medicine and conventional medicine often look very different.
Conventional medicine uses a much wider “normal” lab range.
Functional medicine tends to focus on what is optimal, meaning where women actually feel their best.
That distinction matters.
Because many women are technically “normal” while still dealing with:
exhaustion
hair loss
anxiety
brain fog
weight gain
low mood
low motivation
The Full Thyroid Panel Women Should Know About
If you suspect thyroid issues, it’s important to look deeper than just TSH.
A comprehensive thyroid panel often includes:
TSH
Free T4
Free T3
Reverse T3
Thyroid antibodies (TPO and TGAB)
Especially because autoimmune thyroid conditions like Hashimoto's thyroiditis are incredibly common in women and are often underdiagnosed.
Why Thyroid Issues Become More Common in Midlife
Once women enter perimenopause, thyroid disorders become more common for several reasons. Fluctuating estrogen, declining progesterone, higher cortisol levels, chronic stress, inflammation, blood sugar swings, toxin exposure, and autoimmune triggers can all impact how well the thyroid functions.
Because all of these systems are connected, hormonal changes during perimenopause can place extra stress on the thyroid and contribute to symptoms like fatigue, brain fog, weight gain, anxiety, low mood, and feeling unlike yourself.
This Piece Matters More Than Most People Realize
Now let me say this clearly…medication can absolutely be necessary and life-changing.
Thyroid medication helped me tremendously. But lifestyle matters too. So much.
I truly believe that supporting the body through:
nutrition
blood sugar balance
sleep
stress management
movement
reducing inflammation
and nervous system support
…can make a massive difference in how women feel.
Blood Sugar Stability Matters More Than You Think
You’ll probably hear me talk about blood sugar over and over again because it impacts everything. Blood sugar is simply the amount of fuel in your bloodstream. Your brain runs mostly on that fuel. When Blood sugar is steady, you feel calm. When it drops too low, your brain senses danger, and your mood, energy, and emotions can shift quickly.
Blood sugar instability stresses the body, and it stresses hormones and the thyroid.
Simple things like:
eating enough protein
not skipping meals
getting enough fiber
reducing ultra-processed foods
walking after meals
can genuinely help support hormone and thyroid health.
How to Advocate for Yourself
If there’s one thing I hope women take away from this post, it’s this:
You are allowed to ask questions.
You are allowed to seek answers.
And you are allowed to want to feel better than “fine.”
You do not have to accept: “Well, you’re just getting older.”
Nope.
You know your body better than anyone else.
And if you feel like something is off, keep advocating for yourself until someone listens.
Perimenopause Magnifies an Underlying Thyroid Dysfunction.
When hormones, stress, sleep, inflammation, and thyroid issues all collide at once, women can feel like they are unraveling.
But please hear this:
You are not lazy.
You are not failing.
And you are not crazy.
Your body is asking for support.
And there are absolutely things you can do to help it feel better again.
Hi there, I’m Jenny
I’m a Board Certified Functional Medicine Health Coach, podcast host, wife, mom of two teens, and lover of nature, farmers' markets, and a really good cup of coffee. After struggling with weight gain, anxiety, low energy, and brain fog after turning 40, I discovered a simpler, more sustainable approach to health through functional medicine and lifestyle changes. Now, I help women over 40 navigate perimenopause with realistic strategies that support hormones, energy, mood, sleep, and confidence, so they can finally feel like themselves again.
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