I've just weighed myself and am 10st 13 which is "only" a gain of 4lbs in the past 10 days and 6lbs in all of December. I have to say I was delighted my weight still started with a 10 and I hadn't slipped into 11st something. I was expecting it to be worse as I feel so bleurgh but I think that is because I am bloated, lost any tone as haven't done any exercise in a month (partly illness, partly socialising) and have had at least a couple of drinks each day for a month when I don't normally drink.
I hope to lose it all again in January and then want to shift a few more pounds too so I am into the normal BMI weight rather than the very heaviest weight I can be without being an overweight BMI.