Same with me! I've been on Atkins for exactly three weeks now. Lost seven pounds the first week. Slowed down the second week and by last Friday was down 8.5 pounds! I felt great. Then, weekend came and went, more exercise than usual (I added a mile to my daily walk and did more yardwork, etc.) Today, I'm back UP 4 pounds! I'm frustrated now. And I've never really left induction.
I'm not planning to do anything differently, but I'd like to know how others get over this hump!