Barbara,
It took me almost a week to register my first weight loss because of the fluid build up. Then I lost about 5 pounds in one day. The first week I lost 11 pounds, the second week 6 pounds and the third week 8 pounds. My scale will go down two or three pounds in one day, and then shoot back up. It was a little depressing at first but now I know to expect it and it doesn't bother me. Good luck to you and congratulations on your surgery!