How do lose the weight i gained from zoloft?

So before I was out on Zoloft I weighted about 125. I didn't eat much, I only ate twice a day but would eat a few snacks n I never gained weight from it.

after taking Zoloft within the first few weeks I went up to 130 pounds. Then went up to 135 then 140 then 145. and now I'm currently still 145 and have been for a month. I eat constantly, I drink pop more then I usually would. Idk what to do. I've tried working out but didn't stick to it.

My cousin who was on Zoloft had also gained 20 pounds from it.

Does anyone know any good work outs? I seriously just want to lose this weight so I can feel confident again. I have stretch marks on my thighs, under my boobs and under my arms near my armpit.