almost 4 months postpartum tummy/scar

I've lost 30 pounds so far, but my stomach muscles are so weak. My stomach is very flabby still, it's getting flatter all the time but nonetheless still flabby (ughhh gotta work out). Do any other moms have an issue with their belly button being discolored? That's one of my biggest insecurities is how dark my bellbutton has gotten. These pics are unedited and from this morning. Idk, I need to share them but this is the only place I feel comfortable doing so.