Hey, I Am A 22 Year Old Female. I Had

hey, i am a 22 year old female. i had a tsh level of 3. six months back but i didn't take any medicines( i did take something like O... d300 for 15 days, but can't really remember the name)
my hair is falling , thinning and i feel rather depressed and not upbeat. what should i do? what medicines to take?

i also have a thyroid condition, my tsh was 25 , even though i am pretty skinny , but i take medicines for that everyday and tsh is under control (last i checked 4.5).