You could have a form of acid reflux caused by part of the stomach herniating through the diaphragm, see you diaphragm if these diaphragm have been going one for more than one week.
I Am Constantly Burping And Feeling Sick To My Stomach Every Time I Try To Eat What's Wrong?
It could be a stomach virus, but that is a very good question for your doctor,it could very well be a sign of something else going wrong,don't guess concerning your health.....the best to you