How to manage blood sugar problems?

Due to having anorexia for 4 years I have hypoglycemia so now if I don't eat I get really sick and pass out. Recently I've been noticing that my blood sugar drops quicker now and I have to continously eat throughout the day to keep it up but I'm gaining a ton of weight. Btw I'm completely recovered and at a healthy weight. I don't know how to handle this or what I can eat throughout the day that will keep my blood sugar up but not make me gain anymore weight.