I am experiencing nausea (severity: mild), burping and constipation. The following also describe me: Passing gas, Abdominal discomfort, and Frequent stools. What should I do?

Doctor can evaluate. Many things are in the abdomen: stomach, pancreas, liver, gall bladder, small and large intestine, abdominal muscles, etc... An exam by a primary care doctor can help figure things out. Pain in the right upper abdomen, especially with symptoms that occur after eating, can be due to gallstones or other gall bladder disease. Frequent stools and gas can be lactose intolerance or a stomach virus.