I didn't lose a single thing this week

0 pounds. It is very very discouraging. I have changed my weigh in day to Friday to see if that helps. I will try to increase activity. This week may be a challenge because I am flying to DC Wednesday. But that should definitely help with the activity. 3.2 pounds to go before I can schedule my surgery. but I have to be able to schedule in June at the latest. Why is this taking so long?????