Beaniebunny...Don't worry about a thing...the Doctor with the black hose will be very gentle. I got to watch the whole thing on a television screen. I didn't have the complete, knock-out version...only up to the first bend.
It's true that a barium enema is eleventeen times worse!!!
I found that the prep-work wasn't as bad as the daily symptoms.
Worst of all is the part where they tell you it's not life-threatening, but it's not curable, either. Keep a change of clothing in your car at all times. Keep Imodium in your pocket. Buy stock in Kimberly-Clark. I can't believe there are almost 20,000 members of this site.
Hope that together we can all find solutions.