IBS, GERD, Gastric Reflux, infectious gastroenteritis..So these are the diagnosis I have gotten over the years by several doctors. How can we zoom in on the right one (s)? I take prilosec it works good on the acid but sometimes I will have to take something extra ie; Tums or Zantec I dont know what the doc prescribed for IBS, or Gerd. How do I find out what I really have?