I agree with other posts that this is totally normal. I had almost a month of little or no weight loss and then I changed from working out in evening to morning, added more "real food" like fish and veggies, and began tracking EVERYTHING on MyNetDiary. Then yesterday, BOOM, lost 3lbs. I have lost 30lbs since surgery on July 11 but this surgery is definitely not the easy way out, I think more and work harder on myself since this surgery then any other program I have attempted.
Stay strong and just shake up your routine, you have to outsmart your body!
Good Luck!