Thanks for your information on colonics. I will admit, as you guessed this does run completely perpendicular to everything I've ever been taught. But after having been to the doctor multiple times and told I'm fine, and I *KNOW* I'm not fine (I've had coworkers and customers comment me on it, so I know I'm not just being paranoid, even though I can't smell it myself), I'm ready to try just about anything.
I've got a couple more things lined up: I'm going to continue my diet for a while, and also try the apple cider vinegar/stomach acid pH thing that another user posted first, as these things are a little less extreme than what you're suggesting. However, if they come up with no results, I'll go down the detox route. I did a minor detox, but it wasn't anything huge, just about a month.
The most frustrating thing about this whole mess is that I've always been a very scientifically minded person, and yet every single treatment I've found for this "condition" (which modern medicine refuses even to label as such) flies directly in the face of everything I've ever been taught. If you had asked me this time last year, before I even knew what FBO *was*, I'd have told you that all of this is BS. But if modern medicine offers no treatment, I suppose I'll have to turn elsewhere.