Hi. Thanks for your query. Noted the history about the possibility of acid reflux disease, more worried about excessive gas on sitting for a long period, tried changing the diet, OTC medication, tried not eating at all, nothing works. The acid reflux disease is also called as GERD, gastroesophageal reflux disease, and can be due to many factors. Anxiety and tensions being the commonest. Hot spicy foods, tobacco, alcohol and so on. You have to avoid all the foods and beverages that instigate or enhance the problems. Excessive gases can be due to: Aerophagia meaning swallowing of air inadvertently, usually due to stress and anxiety. Get a control over these. Carbonated drink - should be avoided. Gas producing bacterial overgrowth - can be controlled with a course of an antibiotic and metronidazole. Take all these care and you will be fine.