Looking back I think I started out hyper... which sounds like what you are describing. No sleep, resting heart rate through the roof and ridiculously anxious.. Not good memories. Then for a period of about 10 years I think I was hypo and just getting gradually and gradually worse until there was no denying the symptoms.
Well I've been on the medication Thyroxine for a little over a month now and it has pretty much reversed all my symptoms and my hair has stopped falling out. Yay !! I haven't had another blood test done yet since my THS was reviewed from 311 to 52 and so now I'm hoping to be back closer to a normal range. I hadn't realized how fatigued and bloated and anemic I really was. My husband for the first time in our marriage has said that I am now warm in bed instead of being freezing. The only strange side effect I have noticed is that I am itchy at times. I am never normally itchy??? So this is a little new for me. But considering the massive relief of all the other symptons (yay for NORMAL periods) I am really happy !
When I first became hypothyroid (late teens) I would lose quarter-sized patches of hair. These would grow back, fall out, grow back. I had bad luck with medication of my condition. It gave me the jitters, so I never really took it. I think my thyroid function at some point returned to normal (no hair loss), only to return later in life when I was suffering from exhaustion and insomnia and everything went haywire. Now that I think about it, I also suffered from exhaustion when I had the first bout of hypothyroidism.