Worms. I found mine by eating raw garic and onion for a few days, recommended to me by an ND for stomach bloat. I looked 12 mos pregnant. Raw garlic will help with bloat, relieve the gas, and help to find parasites if you have them. It takes a few days, and you have to sift through your stool to see them.
2-4 cloves, several times daily while maintaining the diet you are currently on would probably work great.