Good luck, retrokitten! Don't give up. If you start bouncing back again, examine closely what particular foods you're eating. For me, I dropped 17 lbs, then gained half of it back. Then we stopped eating ice cream for dessert. (OK, stop snickering, it was our nightly carbo-reward. :-)
We also stopped eating peanuts, which had become our favorite snack food. In both cases we had kept eating more & more each day. So we cut them out of our diet. Since then I slowly lost weight again, and today I'm 23 lbs (and one dress size - woohoo!) lower than when I started.