How to maintain weight during pregnancy?

There is a chance I may be pregnant, maybe not. But I’m just being really paranoid.

We want another baby, but I have a lot of weight I want to lose before then.

I gained EIGHTYYY pounds with my first pregnancy (she is 21months now) I have only managed to lose 40 of that. And there was a lot of losing/gaining going back in forth. I’m very hormonal and bleed almost everyday for the past 21 months. (I have been to multiple doctors) This last month though was like I had a normal period. That’s why I’m so paranoid because we had sex after that and now no more bleeding.

Basically I just want to know what y’all have done to keep your pregnancy weight gain at a minimum?

I don’t think I could live with myself if I gain anymore weight.