I'm 6 weeks, almost 7, out of surgery and had that same worry. I actually gained a pound when I went to purred food from liquid. It freaked me out and got me upset. But now 7 weeks out I can definitely tell you there is a limit to what you can eat. My advise is to stick to the food plan the docs laid out. Find your satisfaction point no matter if its 1 oz or 5 oz and don't be discouraged at this point. Give it another week or two and if you are still at a stand still with weight talk to your doc.