now that I look back, I relize I've had it all my life. What kicked it into over drive was one day my junior year in high school the outside temp was up near 104 and we were in school with no air. I'd always been sensitive to heat and that did me in. I still can't stand summer, but oddly enough, saunas seem to help; i stay in there for about 15 minutes and then go jump into the pool and I feel much better. Maybe because I'm glad to get out of the heat!
I to had the colonoscopy without anestisia, I think the barium enema x-ray was worse. I was cramping so bad that I had a death grip on the sides of the x-ray table and started bending the table up. The doctor started flipping out and an x-ray tech gave me a folded up towel to squeeze, I ended up ripping it in half. Thats when they finally got the idea to sedate me.