November gain

Weighed myself last night to see if I'm anywhere near my pre-Thanksgiving weight. I was 152!?! Even accounting for food I'd eaten, that's still 150! How the heck did I gain over 5 pounds, pounds that now won't come off?!? I've been REALLY good. Why won't the weight come off?!?

I've been dieting and I gain in November?!? WTF?!?