Helicobacter pylori is a bacterial infection that is extremely common and is the most common cause of stomach ulcers. Sounds like you've got a case of gastritis anyway. Do you take NSAIDs (ibuprofen, naproxen?) Those can cause stomach ulcers as well. I have superficial erosions in my stomach (of unknown origin - don't have HP) and have occasionally felt the burn myself; not frequently, however, and not particularly bothersome. The best way to see if you're infected with H. pylori is to get a biopsy via an esophagogastroduodenoscopy (EGD) (what a mouthful); there is also a breath test available. An EGD could also tell you whether you have NSAID-induced ulcerations in your tummy.