Plus Size Woes

Well I'm 21 weeks along. Already plus size and now I feel like crap because my mom and husband both feel I eat too many sweets and that I've gained too much this pregnancy. I'm up 10lbs. They think I won't pass glucose test and will give our daughter diabetes (which I don't even have, but have heard about gestational diabetes). I can't lose weight right now obviously because I'm pregnant and I do eat salads and veggies and fruits but I get bored with those or need a quick snack. I feel really really bad and upset right now and don't know what to do. Any help?