Getting rid of baby weight

So I'm a young mother, I used to be a size 3 before I had my son & now I'm a size 12 & its been 9 months since I've had him. I couldn't breast feed because of some medication they put me on right after delivery so it's been really hard getting back to normal & getting rid of this baby weight. Do any of y'all know any exercises that might help me out a little more?? Please & thank you!! 😊