Well for starters your underweight as it is and probably should put some wieght on for your height. I saw your profile and see that you want to go into modelling. Given your past background I would seriously advise against it. I'm in the garment industry and trust me baby with your eating disorders modelling is not the kind of job you need. Its scary how they push drugs on those poor girls to make them look aggressive on the catwalk. And also unless you were planning to be a fit model 5'6" is too short for catwalk and print.

Your going to a great university, eat right, enjoy yourself and HAVE FUN

Keep posting and keep us posted.

Tash