Self confidence and post partum sex

I just gave birth exactly 2 weeks ago to my and my fiance's first baby. We love her tremendously, and my fiance has been incredibly emotionally supportive and helpful. I have always battled a low self confidence regarding my appearances, as I have thyroid problems and my weight bounces back and forth a lot. Before pregnancy, I was about 45lbs overweight, the heaviest I have ever been. I had gestational diabetes and was very strict about maintaining a healthy diet during my pregnancy, and I ended up only gaining 3lbs. I have lost 20 in the past 2 weeks, my pre-pregnancy clothes are pretty loose on me, and while I allow myself a little pride for that, I am still so self conscious of my post partum body.

I have a little bit of loose skin on my belly, some stretch marks, and I worry that when we are allowed to have sex again, my vagina is not going to be as attractive or satisfy my fiance. I have voiced all these concerns with him, and he reassures me he loves me, still finds me beautiful and attractive. Part of me thinks he is just saying it to make me feel better.

Do others have this problem? How do you overcome it? I see all these gorgeous post-birth photos of women of various shapes and sizes wearing lingerie for their SOs and I wonder if I could also be attractive enough to wear something sexy for my fiance, if he would like it, and if it would make me feel better about myself.