New and wanting to get rid of baby fat

Hey everyone! I'm 23 and just had a beautiful baby girl on September 19th. With my pregnancy I ended up gaining over 70lbs, despite all my attempts to stop the gain. I've always been considered a "big girl" but this is the biggest I've ever been. I'm getting married in April 2012 and was really hoping to be at my goal weight of 150 by then. I love to meet new people and anyone who's willing to help keep me motivated is greatly appreciated