If you’ve ever thought, “Why do I feel like a different person lately?”—this might be why.


You’re in your late 30s or 40s. Your periods are kind of changing, but not gone. And suddenly:



And yet—no one mentioned this part of perimenopause.


Most of us were taught to expect hot flashes. But perimenopause? It’s a whole-system shift—and for many women, the mental and emotional symptoms show up first.


Let’s talk about what’s actually going on.


What’s Really Happening in Perimenopause

Think of it like an operating system update… but glitchy


Perimenopause isn’t a clean, linear drop in estrogen.

It’s more like your hormones are… recalibrating in real time.


In your 30s and 40s, your ovarian reserve (the number of follicles in your ovaries) starts to decline. As that happens:


  • Hormones like estrogen and progesterone don’t just decrease—they become erratic

  • Your brain increases signals (like FSH) to “push” the ovaries harder

  • Ovulation becomes less predictable → leading to cycle changes

The result? A lot of hormonal noise.


Instead of a smooth rhythm, your body is dealing with fluctuations—and your brain, nervous system, and metabolism all feel it.


Why You Feel So Off (Even If Your Period Is Still “Normal”)

Research shows that symptoms often increase before periods stop completely—especially during the late stages of perimenopause.


And importantly:

These symptoms are real, common, and biologically driven.

Here’s what that can look like:


Common (but under-recognized) perimenopause symptoms:

  • Anxiety → can increase even if you’ve never struggled before

  • Insomnia or broken sleep → often worsens with hormonal shifts

  • Rage or irritability → faster emotional reactivity, less buffer

  • Brain fog → memory lapses, poor focus, “where did I put my phone?”

  • Cycle chaos → shorter cycles, longer cycles, skipped periods


You might also notice:

  • Low mood or emotional sensitivity

  • Night sweats or subtle temperature shifts

  • Vaginal dryness (which often doesn’t resolve without treatment)


These symptoms often interact with each other.

For example: poor sleep → worsens mood → increases anxiety → impacts cognition.


So if you feel like everything is spiralling at once—you’re not imagining it.


Taking Control: What Actually Helps

Here’s the empowering part:

You’re not powerless here.


Perimenopause is a window of opportunity to support your body through a major transition.


1. Stabilize your blood sugar (this is foundational)

Hormonal fluctuations + blood sugar swings = worse symptoms
Aim for:

  • 20–30g protein per meal

  • Eat every 3–4 hours

  • Build meals with protein + fibre + fat (e.g., eggs + avocado + sourdough)


2. Protect your sleep like it matters (because it does)

Sleep disruption is one of the most common and impactful symptoms


Start with:

  • Consistent bedtime (yes, even on weekends-ish)

  • No screens 30–60 minutes before bed


Consider targeted supplements that match your needs and physiology, such as:

  • Magnesium

  • Melatonin

  • L-theanine


(These are not one-size-fits-all—what works best depends on your specific sleep pattern and nervous system. Work with a provider.)


3. Support your nervous system

That “edge” you feel? It’s not just stress—it’s hormonal sensitivity


Try:

  • 10–15 minutes daily of something regulating (walk, breathwork, stretching)

  • Limit caffeine after 12 PM if anxiety is high


4. Track patterns—not perfection

Instead of guessing, look for trends:

  • Are symptoms worse pre-period?

  • Are sleep issues cyclical?

  • Is anxiety tied to certain phases?


This helps you work with your biology, not against it.


5. Consider targeted support

Depending on your symptoms, options may include:

  • Nutritional strategies

  • Herbal medicine

  • Non-hormonal therapies

  • Or hormone therapy (which is safe and appropriate for many folks)

There is no one-size-fits-all approach—and you don’t have to figure it out alone.


You’re Not Broken—You’re in Transition

Perimenopause can feel disorienting—especially when it doesn’t look like what you expected.


But this isn’t random.

This isn’t you “losing it.”

And you’re definitely not doing anything wrong.

This is a biological transition that affects your brain, body, and mood—and with the right support, you can feel like yourself again.


Want a clear, no-BS starting point?

Download my Free No-Nonsense Nutrition Guide for Women 35+—it walks you through exactly how to eat to support your hormones, energy, and mood (without restriction or overwhelm).


You deserve to understand what’s happening in your body—and to feel good in it, too.



References

Santoro N. Perimenopause: From Research to Practice. PMCID: PMC4834516. PMID: 26653408.

Santoro N. Understanding the menopause journey. PMCID: PMC12319117. NIHMSID: NIHMS2052349. PMID: 39903209.