My IBS is still there, though now it is slowly fading since I started a REAL and conscious anti-yeast diet, which is kind of a trial and error thing, but by feeling a lot better on that diet I presume my problems are related to some infection.
It has been a PAINFULL and LONG process for me. Doctors, test, trial and error, you know it. But there were some pointers like: fiber like psylium and flaxseed always gave me a lot of pain, my weight went down a lot instead of up, and I can actually eat many spices like cheyenne pepper. All of those are supposed to be a NO for IBS. Even chocolate I could eat with no problem.
So my conclusion after 15 or so books, taking to 3 naturopaths and internet research is that yes, it is most likely an infection related problem.
Now I'm taking Miracle-Mineral-Supplement which has been amazing so far, but the die-off is terrible. I mean, I feel sick all over while increasing the dosage, but my bowels are calm, not hurting and not gurgling after meals.