I had my upper endoscopy and colonoscopy done at different times, but both were pretty much a breeze. The worst part of the colonoscopy is doing the prep for the procedure. I recommend eating lightly for a few days prior to starting the prep. From the moment you start drinking the prep, plan on being home and near a bathroom, because you will need it (a lot of doctors fail to mention this). Once you get past the prep, all you have to do is show up at the hospital (or wherever your procedure is), have an IV placed and sit back. I woke up for about two seconds during my colonoscopy, but otherwise I don't remember it. I was drowsy for the rest of the day, but good to go after that. Good luck!