N.,
It is hard. Be gracious to yourself. I have two girls born by c-section and still am conscientious about it and am in prebaby sizes and all....we just were not meant to be the same I guess. I have been wearing snug undertops under shirts to help me feel better. Working out has helped but I am just now seeing that it is possible to be regular in that routine....give it time. Don't miss the wedding, obviously your sister will cherish you in her wedding no matter what you look like. I was also in a wedding and felt uncomfortable, but the problem is with me....no one else has an issue with the way I look....smile big and be yourself....be gracious to yourself.....