Sorry to hear thats, its so frustrating isn't it? If it helps I did the Moonwalk last month (powerwalking marathon) and when i weighed in a few days later I had only lost 1/2lb! I was gutted, my leader said that my body had gone into complete shock doing the marathon (you don't say!!! I was shocked by the time I had finished it) and therefore my body held onto the fat! I'm sure you will have a great week next week.