Hi. Thanks for your query. Noted your history of pacemaker in 2014, have problems with stomach and looks as if nothing is tolerated. You are a known case of diverticulitis, have lots of pockets and suffer from gas. I would advise you in such a situation the following: First of all to make separate list of the foods and beverages that suit your stomach and does not instigate gas formation or pain and such symptoms and you have to continue with these only. Also lake a separate list of the things including that cause anxiety and/or stress that cause this and never to take or consume such things at all. This is the key to the success of control of your symptoms. Also get a clinical evaluation by a General Surgeon or Gastroenterologist for clinical evaluation and the investigations of blood, urine and stool, ultrasonography, colonoscopy and CT scan of the whole abdomen to get the root cause or to rule out any disease or disorder. If all the reports are normal, you can be treated as a case of IBS that needs constant vigilance and the dosages may need alteration as the situation goes.