Also recently diagnosed with a hiatus hernia?

Gastroenterologist: If you don't see a gastroenterologist already, I recommend that you consult one. If these symptoms are more chronic, gluten and/or lactose intolerance come to mind. Irritable bowel syndrome is another possibility. If you can identify foods or food groups that trigger symptoms, you could try an elimination diet and reintroduce certain ones one at a time to narrow down the culprits.