I just wanted to chime in and give you my support! It's great that you are getting healthy and you're setting a wonderful example for your children!
There are some supportive and fun parenting communities here that you should check out - here's a recent post on the challenges of eating healthy from the 4&5 moms: Diets You can find all of our parenting communities here: WebMD Parenting Communities
First of all, I think HUGE congratulations are in order. You must be feeling great.
It sounds like you are stuck on a plateau and I can imagine how frustrating that must be. Check out this article for some tips to get the scale moving down again. It WILL start budging! Stuck on a Plateau
I'm looking forward to seeing our expert chime in with some additional information -