Get a blood test for the H. pylori virus. More then 80% of the worlds population is infected with it and most don't know it.
http://www.siberiantigernaturals.com/pepticulcerfaq.htm.
2 doctors won the nobel prize for proving that a bacteria can live in your stomach last year. The symptoms are the same as an ulcer. I had it for an estimated 4 years thinking i had a stress ulcer and found out it was h pylori. You take some anti boitics and it goes away. You get this virus by eating contaminated foods, usually meats. One of the biggest sources is from eating deli meats where the cutting machine is not cleaned properly.