Colette, whoever said that H. Pylori is not supposed to be prevalent in the developed world I think was seriously mistaken. As I recall, many if not most cases of ulcer and reflux in the "developing world" - a condition that is so often put down to "developed" problems like stress, too much coffee, too much greasy or spicy food, etc. - are actually down to H. Pylori and the reason why people's ulcers and reflux persist for so long is precisely that they are being told it's stress or whatever and NOT getting adequate diagnosis and treatment for likely bacterial overgrowth.
So, although I completely understand the emotional reaction of feeling "dirty" due to bacteria, it's actually a much more common infection to have than people realize. So you're no dirtier than any number of people you pass on the street every day!