Did you lose weight before getting pregnant?

I had a miscarriage 6 months ago and I’m currently going through another one right now. I found out about 3 months ago I had hypothyroidism and now I take medication for it and my level is very good now. I was just looking for any hopeful stories whether it be your sister, you, your cousin, anyone who lost weight and went on to get pregnant and have a healthy pregnancy. My OB would like me to at least lose 20 pounds so I’m just looking for some hope! Any tips on meals, certain workouts, etc would be great!