I maybe in the same boat with you. I was diagnosed hypo a year and a half ago. Suddenly my hair is falling out and my temp over several mornings averages 97.2. Then I looked at my nails and they all happened to break off at the same time. Guess I need to get my thyroid checked more often than once a year.

I have a suspicion that some of the changes downward are simple aging and stress. Maybe being on any kind of diet will lower your thyroid if your prone to that? Maybe exercise and eating healthy could increase it? Heck maybe even the weather? I always feel more sluggish in winter.

Have you had any symptoms when you're thyroid level changes?