I’m blowing up like a balloon

Okay so I LOVE ability as far as how it’s treating my depression goes BUT I am gaining an insane amount of weight. Recently I was moved up from 2mg to 5mg and I’ve been gaining about 4-5lbs/week. It’s starting to show and it’s terrifying me. I am trying to do a calorie deficit and some cardio daily but honestly it only just seems to slow the weight gain just a little. Does anyone have any advice on how to keep the weight off? Is there something else I can ask to take with it? PS. I’m also on Lexapro and Trazodone which I’m sure isn’t helping with the weight either)