Hi there xtxscarletxtx!
I have had a similar experience, my hair turned dry and brittle (well even more than usual) and thinned considerably... but the weird thing was that it only thinned on one side of head! It was only on the right side, which is usually where my hair is the thickest and is the side that grows faster (I'm right-handed), so i really noticed the difference when i was going through anorexia and bulimia. I think i noticed a greater change during my bulimic phase, which was horrendous to say the least.
It is scary when u realise just how much what u do/dont put into your body can affect your hair.
Thanks for sharing your experience, I am glad to hear you are recovering and are well. xxxxxxxxxxxxxxxxxxxx