Been there, done that, several times. Always hated the prep, but it too is survivable. The colonoscopy itself was even kinda interesting first time (I got to watch on the student scope ). Last time, when I was really badly inflamed all through the colon it was pretty painful, but they topped up the dosage on the sedatives and I made it through that round too. For me the worst torture has been gastroscopies. I'd've put barium enemas in that worst ever torture slot, but those I've always had to call off and find some other way of doing the exam. The docs just couldn't get the tube down my throat, no matter how hard I tried to cooperate. Anyhooo ... not to worry about the c'scope. You'll do fine, and all's well that ends well, either with them finding nothing wrong or finding what is wrong and solving it.