Weight Gain after anorexia?

Ok so here is the story i was diagnosed with anorexia 3 years ago and received inpatient treatment for a year and a half and then for one year i had maintained my weight out of hospital (43kg) Then In january of this year i decided that if i wanted to really over come this disorder i needed to gain weight's that's what i did And i was told by every medical professional that my weight would return to normal and stabilize but that hasn't happen i have now gain 22kg in 7 months and i freak out every day but i don't let it show because im trying to not let it bother me so much but when i start to think about it i get panic attacks because this weight gain isn't slowing down and i don't know what to do i've been to the dr numerous time and nobody can figure out why this is happening i am now medically overweight i need to know if this has happened to anyone else who has recovered from anorexia please. Will this stop or will i just keep gaining until im obese ? i eat healthy and exercise regularly