Anorexia Recovery & Treatment

I have been in anorexia recovery since mid august.
i have been eating a 2,000 calorie diet and have gone from 75 lbs – 87 lbs (currently).
how do i know when my body has stopped gaining and is stable?
when will this be?
what are signs/symptoms of it?
how long will it take?

I’ve heard that recovering from anorexia is a process in which one has to “wheedle oneself back up”, but that’s a little vague. How large of a calorie increase and how gradually should this be done in order to not gain weight? And is there more to it than that…?

Ok, so i am in this partial hospitalization program for anorexia recovery. Right now, i am 5′4, 17 years old and 81lbs (i gained a pound this week! which is good, i guess). Anyways, the doctors there want me to reach around 100-105lbs and they see this as an ideal weight. However, i have always been very thin (i have never weighed over 87lbs– i continued to grow in height, but failed to gain weight). The idea of weighing 100 lbs really kind of scares me, but i want to get out of this program so i can go back to school and have my normal life again. I also know in my heart that i need to gain weight, but 20lbs seems like so much. Is 100-105 still thin for my height and age? The idea of gaining 20lbs scares me, and im afraid i will look and feel totally different. I am just really dreading it, because the doctors expect me to gain 1-3lbs a week, (they give you meal plans and calorie increases, but it seems like some of the girls in the program have to eat a ridiculous amount of food) or i will have to go inpatient. Can anyone help me calm down? I’m feeling really anxious and uneasy about all this.
Thanks