First off, during the first two months post surgery, your stonach is still healing. Please be sure to follow the prescribed diet. Secondly, never weigh yourself the first month. Your body is in chaos and weight is a non-issue. Thirdly, many of those with 30lb losses in any month are either very high bmi, or had complications. The average first month loss is 15lbs, and 10lbs thereafter. Normal for you might be higher or lower. Stick to your plan, and you'll do well!