well, I wasn't diagnosed with IBS till last spring, but I've definitely had digestive problems since way back. I've had lactose intolerance for at least a decade for sure..
My mom just told me it was normal to go three days between poops. I remember being in the nurse's room for severely painful gas as young as age 8, and in Girl Guides, had a stomach ache I was sure would kill me.
I was also terrified of pooping in public toilets. Now that I'm much more often D, I ahve no choice, LOL, but in Disneyland, I was so C and so terrified to poop that I held it for an hour waiting for the room to clear so I could do my "dirty deed" alone. I'll never forget how stressed I was that day, and how nauseated. Hmm, maybe it wasn't the rides after all.