The same thing happened to me, I was anorexic and weight more than you now! It really sucks.... But try to throw in workouts and use the gym. Anorexia often causes yo yo dieting, and throughout a while your weight shifts until you eventually get bigger than you've ever been. The same happened to me. Just diet healthier. Eat more greens and fruits.

You can be thinner in a healthy way. I so hope you feel better! I know it can really hurt.