Why do I have a weird protruding tummy?

I’m 14, and of Afro-Carribean/Indian descent. I’m one of those people who have a steady weight that practically never changes - 110lbs, and I am about 5’2 or 5’3. The rest of my body looks great, normal, very toned and slim, because I dance 2hrs every Monday and Wednesday.

However, my stomach is really weird. I have a really round, protruding belly, and this huge amount of abdominal fat on my stomach, despite dancing and having an otherwise normal body. I used to eat really big portions, which I cut down on gradually for the past year or so, and a lot - to a normal amount - in the past few months. I even tried a diet with only a few tiny portions, and my stomach got smaller, but the fat stayed. But I’ve noticed that every time I eat, my stomach literally grows bigger. It’s really weird because the fat doesn’t hang off my stomach - my stomach is round and solid; only when I sit are there rolls, and they stick really far out. My stomach actually adds about two inches to my waistline, and it really freaks me out, because I eat pretty healthy, with normal portions, and I dance.

Since I have a lot of responsibilities, I thought that it might have something to do with stress, but I have no idea. I’ve been trying to figure this out for two years now. Can someone help me?