iam nine weeks post op and i did not lose any weight last week have lost 30 lbs since surgery. The week before i lost 7 lbs. i live by myself. i have been going through a lot of stress the last few weeks over a pair of new dentures that the dentist that made them will not redo and have had to go have to go and have a new pair made some where else. can stress cause a stall in the weight loss.