Aw Nina, I feel your pain! I fall off the wagon when I sts for a couple of weeks. I treat myself to popcorn at the cinema. Funny thing is, whenever I do that, just once every other week, I have a loss.
When I first started, I ate pizza hut every other week and I was losing. Since I've been being strict, I've sts and gained and lost the same 2lbs.
Maybe my body needs a small carb binge every week or so?