Buddy, I remember your angst last year, too, about this procedure.

But, happy to say, you survived it!! And you'll be fine this time, too.
I had it done about 3 weeks ago, and as everyone agrees, drinking that prep solution is the worst, the day before. Just keep around things like yellow Gatorade, and lemon jello. Some docs let you also have lemon popsicles, but again, do what they tell you and be very careful about darker colored dyes like cherry, for example--avoid.
Anyway, got it over with and 2 pre-cancerous polyps were removed. This was the third time in maybe 20 years that I had the test. (My mother had colon cancer. So with the recent test, they have now put me on a 5-year recall.)