Im on a 3500 kcal diet and my stomach has started to pop out. So for the past 3 days i've stopped trying to gain weight. Im underweight and my bmi is just 17. My training routine includes overhead press squat barbell rows and deadlift. My mantainance is around 2000 kcals. How much kcal excess should i make so that my waist doesn't pop out. Pardon my bad english. Thanks