Hey J.,
I turned 30 in September and had my 3rd in October. Like you, I am having a hard time losing this weight. On top of it all, this pregnancy I wasn't allowed to exercise, and had bed rest for the last 3 months, so I came out of it very "blubbery" and weighing so much more than I had with either of my two older kids. I am absolutely what is considered having the "pear" shape now, and it's not an easy shape to handle being, when I feel that I look so mis-proportioned. It's crazy too, because my eating doesn't seem to help matters either. The only time I see a difference is when I eat small portions, 5 times a day, rather than 3 sit-down meals...but with these 3 needy-always-active-fighting-with-each-other-get-into-everyting-kids, I can't seem to keep to the schedule or even be able to eat before 8pm sometimes. You'd think that with all of these active kids, I'd lose weight no problem, but not so. My body is in refusal mode, and has decided to lean out my fore arms and legs, but keep my face and belly pretty plump.
I've just finally settled myslef with waiting for my youngest to not be so dependent, and my oldest to begin school, before I will actually have some sort of time to devote to exercise and eating properly. In the meantime, I exercise when I have a chance, even if I know that it will only be 10 min, but I make sure that I exercise hard, and just keep it moving for the entire 10 minutes at a fast pace, no matter what I'm doing...squats, lunges, pushups, leg lifts, etc... My current goal is to not gain any more weight, until I can devote more time to losing it. :o)
Good luck!