Help with anorexia? Im just starting to recover and i feel like im gaining weight too fast!?

im 5'3 1/2 almost 19 years old and 90 lbs. i have been anorexic for a year and for the past 8 months only consumed btween 100-300 calories a day. i am trying to recover and have been eating more but i feel like im gaining weight too fast so im afraid to up my calorie intake. i know i am in starvation mode so my metabolism is slow but how do i get it back to normal and how many calories should i be having a day to recover but to prevent extremely fast weight gain. also what should i be eating and how often? i NEED suggestions for meals to eat a day. today i had an apple, a few soy crisps, some egg beaters scrambled eggs and some crackers. i dont know if thats too much or too littlle to be starting out with?