Everyone's body is different, a lot of women who breast feed actually gain weight until they're done. But, try to wait to work out your abs until the space closes between them or you could really injury yourself and it takes a while to heal. Walking is always good, gets you out of the house plus baby can come with lol I was running a lot with my husband as well.

Just do what's comfortable, your body will be able to tell you a lot. Or you could also look up post partum workout, might not seem like a lot, but it's a start(:

You can do mild exercise like walking just not a whole lot. You're going to be a little sore so you just wanna take it as easy as possible.