I'm having the same problem too, sortof. Except I feel like I'm eating too many calories. Yesterday I had about 2200! I'm used to eating 1300-1500 before Atkins. My carbs have stayed at 20 everyday. But could I gain w/ such a high calorie count? You know, I could probably answer my own question. I started Atkins Sunday and I've already lost 6 lbs!