Hair naturally falls out. You don't brush it, it will fall out where you don't want it to. Brush your hair. That's all there is to it. (especially with thicker/longer hair)
33EP! AH! im sorry to hear about that but i now exactly how u feel! but dont worry, u can and will grow back beautiful thick hair! I have been taking iron supplements, a natural one, called spawater or something? and i believe its been helping! so all the best and do let us know how u get on!!
i started taking bio-h-tin 1 month ago and it's SO GREAT! (omg, now i sound like on of those media-shop people haha) but seriously: i love it. my hair loss defenitely got better and it seems like for every hair i lost, there are 3 growing back