Ok just a thought...hair starting to fall out can also be overproduction of testosterone or PCOS...polycystic ovary syndrome or something.

You shold really have your sex hormones tested...

testosterone (total and free)
estrogen and estradiol
progesterone
IGF1 - human growth hormone

And I was in a similar situation as you. Was hypothryoid and recovered for a while, came off the meds. lasted about 7-8 months and then bam TSH went back to hypothryoid.

I went back on meds and then it made me hyperthryoid....and developed Hashitoxicosis just ike HEperson described. I was orginally dx with hashimotos thyroiditis and a goiter

Had my thyroid taken out. Feeling better but if one set of hormones is out of whack for a long time then another set can follow. Its like a 3 legged stool, thyroid hormones, sex hormones and adrenal hormones. If one off then stool unbalances and others compensate.

Now that thryoid is out and controlled I am trying to regain balance of sex hormones. Low estrogen and I am likley in perimenopause but its a bit more exaggerated.

So get those sex hormones tested and be sure to remember what day of your cycle (that is if you are female)