I ate a large breakfast at a buffet and it's been five and a half hours since. i'm bloated, my stomach has expanded. how can i get rid of this feeling?

It will pass: If you are constipated a laxative may help. If you ate foods high in lactose (dairy products) this may be a sign of lactose intolerance. Exercise may help pass or mobilize the gas through your colon but certainly avoiding further intake of foods containing lactose will help prevent it from happening again. Take careful not of what you ate that causes this and avoid in future