The exam was a breeze because they put me to sleep. It really is nothing to worry about, BUT, the prep was really bad! Lots and lots of salty, battery acid tasting fluid to clean the intestines out. I got thru it by chewing on a piece of mint gum after each glass. That really did help out a lot. Your not supposed to eat anything but I had heard that it was okay to chew gum, and my doctor said I was nicely cleaned out.
Best of luck to you, and it is better to have it done then not... no worries! Take care!