Fat and depression

I had my second baby nov 29. It was normal delivery just like my last baby. I’m 22 and was 210lbs end of pregnancy afterwards dropped to 185. And within the last 7 weeks I gained 15 lbs !!! Now I’m 200lbs . I’m 5’7.

I really don’t want to be 200. I want to be around 150-155

Can someone tell me what they did to help lose weight ? I can’t go to the gym because I have two babies under 2 years so I’m always home with them .

I am combining breastfeeding and formula.

I dont know where to turn to .

I don’t feel good about myself 😖