Now that I understand your time frame that is a bit odd. I am on week four of the sleeve, but I average about 600 calories a day, some days I get up to 800, but it is rare. I am losing slower now but I have lost every week, except second, I gained a few, then took it off and more. Make sure to track all of your food if you aren't already and show the doctors you are working with. I have heard of some others that have struggled as well.