Hmmmm.....colonoscopy
I've had one. The only words of advice I have for you is on the day before, don't go any further than 5 ft from the toilet!!!

Really, the preparation is worse that the procedure. They give you something to relax and believe me....you will go "far far away" and wake up when it's all over.

It's a good test to have. On mine they found and removed some pre-cancer polyps...they even showed them to me (I asked to see them). Don't be nervous. Just look forward to the drugs.