Southern28, I think for three days, if you really eat tremendously healthily and with lots of water (no salt), you WILL feel better. Psychologically too, because you'll have gained back control over your body that Christmas sweets & indulgence have stolen away.
I know I feel the same way as you do, and I've resorted to plain oatmeal for breakfasts and Spicy Hot V8 juice for snacks. I've been exercising all along, but no weight loss because I've been piggy otherwise.
You'll feel more like yourself soon! Your post has encouraged me to attempt some of other people's good ideas too. (Like just now, my co-worker was breathing chocolate as she was talking to me, and I ALMOST asked her to share her chocolate, but I didn't!)