Second Miscarriage and Weight

So I'm going through my 2nd miscarriage right now, and my doctor has found no rhyme or reason for either of them, except maybe my body not producing enough progesterone. I've researched this, and lack of progesterone can be caused by weight.. I've decided that before we try again I want to lose AT LEAST 20 pounds, because I cant keep going through miscarriages..

I know soo many women who are overweight and have had several healthy pregnancies. But I guess my body can't handle it.. so I'm gonna fix it. Wish me luck ladies! I wanna be down 20 pounds and pregnant with my Rainbow Baby by March!