What can i do to make my hair grow after it fell out from hypothyroidism?!

I'm 16 and all my life i have had very thick glossy blonde hair which used to go down to my waist, i know this may sound big headed to some of you but it was gorgeous and it defined who i was, everyone commented on how beautiful it was and i loved my hair. Then i got diagnosed with hypothyroidism last year and at first i never had any problems with my hair, just all the other symptoms, my tablets never relieved any of my symptoms and for 5 months now i have had very bad hair loss, it's devastated me to the point where i cry every day. I take Levothyroxine and have done for the whole of the time i've had an under active thyroid. It's showing no signs of stopping falling out and i've had no new growth. Theres no thickness to it at all, it's very dry and knotty and i hate it. It started off gradually but in the past 2 months it has been rapid hair loss and im starting to get patches with hardly any hair on it. I am pretty certain i will go bald unless i do something about it and i have no idea what to do. I wanted to switch to armour so i went to a private doctor and he said if i went on it i would have to come off levothyroxine for 4 weeks because i have an adrenal problem, and i dont want to do that because although the levothyroxine isnt doing much for my hair loss it's stopping my fatigue slightly and i get a lot worse when i'm off the tablets. The hair loss really has made me feel suicidal, i know that sounds silly but my hair really did mean everything to me. I have had some answers on here previously about my hair loss and all my other problems and they have been quite insensitive towards how i feel about it. Please can someone give me some reasurance that things will be ok? :( I'm pretty desperate and if i ever did go bald im pretty sure i couldn't carry on anymore.