I'm sure you'll be fine...my procedure was a breeze I hear you on the nausea/throwing up issue, I'm petrified of throwing up. I had some Gravol on hand for my prep, and I'm glad I did. I did the Fleet and I was fine with the drink, I didn't get nauseous until about halfway through the night...I took two Gravol and it calmed it down pretty quickly and I never threw up.
I've heard from some people that taking some Gravol prophalactically (sp?) helps so you might want to try that.
I've also never tried the pills (they're not available in Canada) but I have heard some good things about it from people. If you have a really weak stomach it might be a good option because even though you don't have to take a lot of the Fleet, it does still taste pretty unpleasant