No confidence

Lately my confidence has been so low ... I can't get over hating the way I look. I can't seem to get my confidence up even if my fiance tells me everyday how beautiful I am or how much he loves the way I look. Doesn't help we just had a baby a month and a half ago and I lost all the weight I gained during pregnancy but the weight I have now that I have had way before I was pregnant still get to me and now I have a C-section scar that goes up and down my stomach doesn't help the way I see myself. I see all these big girls are the time with so much confidence and get a little jealous. And I hate feeling jealous seeing all these beautiful women just owning themselves I want to ask them how they built up their confidence but I don't even have enough confidence for that and it's just putting me in a really stuck place right now