Well, just to share with the OP, I did lose my tummy after my pregnancy (through manic exercise and breastfeeding) and you get kind of this hanging flesh that is left after your pregnancy tummy is gone. It's just stretchmarked, wrinkly skin (sorry if its TMI!!!). The only thing that REALLY gets rid of a post pregnancy tummy is a tummy tuck. Some women are lucky and they show no battle scars from pregnancy but for those of us that pregnancy weren't so kind on, it's pretty much our only option.
However, I'm still young and will probably push a couple more puppies out before my 35th b-day so plastic surgeons suggest you get all your kiddies out of the way before having one.