How much weight will i gain back?!

I was bulimic for 5 months and started recovery a couple days ago. I've had slip-ups since then but i know the road to recovery isn't perfect and i'll keep trying. I'm a 5' 1" female, 20 years old, and my lowest weight was 97 lbs. Now, it's four days later and I'm now 100 lbs, which i'm a little uncomfortable with, but it;s for a good cause. My question is, how much weight does a bulimic gain back on an average while in recovery?
thank you.