I have been on a weight training program for about 3 weeks now. I workout 3x's/week. I am eating 6 meals/day w/plenty of protein, carbs, etc. My goal is to gain muscle mass and lost body fat. I have noticed a gain in muscle mass but I'm not sure if I'm losing body fat. My understanding of gaining muscle is that it will use the fat storages I have as an energy source and my overall body size will actually decrease. But my overall size has increased. Is that increase just muscle or is it muscle with fat? Or is an initial body size gain normal and will eventually decrease as I gain more muscle?