I had a C-section! belly weight and Gall baldder issues! help needed here!!?

I had a c-section and 3weeks after my baby, i lost all 30pounds including some belly fat.. later that week, i found out that i have gall bladder stones and that my gall bladder must been removed.. :( As of now, i have huge belly, a little of huge weight and ofcourse big time constipation! my question is, is my belly bulging cuz of gall stones or what? and how do i controll my weight and tummy!