I have been feeling slightly nausious for the last month. It comes and goes,. I can feel fine for a few minutes, then the generak nausea kicks in, then, I can stand or sit ( change positions) and then it goes away temporarily. I have some difficulty trying to burp or expell air. I do not smoke, I am not on any meds, I do eat processed foods and work in a somewhat busy environment. any clues to what it maybe.