Three different questions.

I am breastfeeding and I was wondering when will the bleeding stop and when will my period begin? Bleeding right now definitely looks, acts and feels like a very regular period. It's not heavy as it first was. My periods are never heavy but I change my pads once or twice a day. Also, when should my abdomen heal? I want to start working on my abs again but I'm not sure how long do I have to wait. Another question: When they send you home with stitches, do they dissolve over time or do they get taken out on the six weeks postpartum appointment?