I thought I would see what the preceeding events to everyone's IBS symptoms were.
Mine started about 3 years after I started my current job. I was in debt, having issues with my fiance, and getting ready to be laid off from work. I wound up being stressed out of my mind. I started having back issues, which were possibly UTI related, but nothing was positive, and I didn't do doctors until it was too late, so he put me on some antibiotics for the UTI. Soon after that I started having burning in my stomache, and not being able to eat anything. The Dr. said I had H-pylori, and treated me with a prev-pak, I didn't eat for two weeks straight, lost 35lbs. Ever since then I have had the problems with my gut, which seems to be defined, or I guess the actual lack of definition, as IBS-C. But not really so much C as just IBS.
So thats my story, probably stress related to start off with combined with eating at McDonalds 4 or 5 times a week.