I am having the same experience. I was banded one week ago. 8 days of clear liquid, 20 pounds off and so weak I could hardly stand. I called my doctor and he said I was malnourished duh. Your weight loss probably reflects a tremendous amount of fluid and going into a bit of starvation mode after surgery when you're trying to heel. Consider the 4 pounds up to be healthy and replenishment of fluids you desperately needed. It's a good thing. The scales do vary of course but so does your weight throughout the day. Weigh once a week in the morning and go by how you feel and clothes fit. Even after 20 pounds off my jeans are actually tighter probably because of the abdominal swelling. Its a long road and we just started the journey.