Weight gain after Ectopic Pregnancy

Need some help from ladies that went through this simular situation. Is it normal to gain weight after having an Ectopic pregnancy? My numbers were a 0 about 4 months ago. After my numbers disappeared and I officially didn't have an Ectopic pregnancy anymore I started gaining weight. I don't eat a lot during the day. Most of the time 1 big meal. I'm a certified nurses aide so I'm on my feet constantly when I'm at work. I gained a little more than 10 pounds. After having my baby girl a couple years ago I went back to my weight before pregnancy. Any suggestions on how to get rid of the weight I gained? And is it normal? By the way I can only fit ONE pair of my shorts and NONE of my jeans. Hips feel wider, boots got bigger, and belly gained some plump. Any help please. I need to loose it in less than a year. I have to fit in my wedding dress!