And, not knowing what you ate, but if it included treats, your gain from Thanksgiving is probably also water weight, as your body is processing the extra carbs. I tried my best to eat hearty on Thanksgiving, and the day after(PIE day at our house) but when I looked at the amounts, it really wasn't even that much. It is HARD to eat an EXTRA 7,000 calories to actually gain two pounds of fat.
Not to be picking at you (hope it doesn't sound like that). I guess what I am trying to say is, I bet a few rotations, and you will be back to normal.
I went down 4.5 pounds after my first Down Day after Thanksgiving. Whoosh, goes the water weight!