Hello, For the last year I have had an episode every few months when after lunch I feel very sick to my stomach, upper abdomen, there is pressure, feeling like I could vomit, sweating, some loose stool, some gas. It last for an hour or so then goes away with no other symptoms. I am not constipated. Usually just happens after lunch meal. Last month happened after just eating a lean roast beef sandwich and nothing else. Today after eating a turkey on rye and a few baked lays. I have a physical next month but looking for a probable cause. Thank you