Losing baby fat help?

OK, I will try to keep this clean lol. I had a baby a tad over a month ago, and I am trying to get back in shape. I recently resumed my daily jogging which is almost 5 miles a day, but in addition to losing the ten baby pounds, I'm hoping to, no praying to firm up the chest again. I am still lactating and having strength issues, so I was wondering if stair push ups are as effective as regular pushups? I'm just not at the point where I can do regular pushups yet since alot of my nutrition is going into milk production? If that makes sense? Sorry if its too much information, but I need a little input lol. :)