Crohn's can simmer along at a low-key level for years, yes. It's not always characterised by severe flare-ups, or else it can take years for the damage of Crohn's to set in (strictures, fistulas etc.). A minority of people have a lifelong mild course.
What makes me think you are less likely to have Crohn's is the lack of diarrhoea. It's unusual to have Crohn's without ever having had diarrhoea, something which I can't tell applies to you or not. That said, I think it's a bit appalling the way you have been fobbed off with IBS and 'food sensitivity'. In theory, IBS is a diagnosis of
exclusion; that is, IBS is only diagnosed after all other possible causes of have been excluded. But all too often, IBS is the
first diagnosis.
My advice would be to find a different doctor and get some tests done. Blood and stool tests to begin with, then further GI investigations if necessary. Ask for a faecal calprotectin test; it tests for a marker of intestinal inflammation and is a decent way of distinguishing between IBS and IBD. (NSAIDs can induce false positives, I should let you know, just in case you are taking any for your pain.)
Edit: I'm tired and I don't seem to express myself very well nowadays, but I didn't mean to imply the faecal calprotectin test is the be-all-and-end-all of diagnosis. If it's negative, it almost certainly isn't IBD, but there are other causes of abdominal pain, which should be looked into.
Post Edited (NiceCupOfTea) : 9/23/2013 7:36:51 PM (GMT-6)