I’m sorry for your troubles. It’s good to get a colonoscopy. I assume you failed due to inadequate prep? That happened to me, twice. The exasperated doctor was quite mean about it. Luckily I had a Mayo doc who knew what to do about it. I have a weeklong prep. No whole wheat, whole grain anything and the usual restriction against small seeds. I don’t eat at all the two days before colonoscopy. Two nights before the procedure, I drink my first prep, which is something citrate in a small green bottle in the pharmacy for people who are constipated. The word “ something “ means I don’t remember the first word. That night I get up and am in the bathroom moderately often. The next day, which is the day before colonoscopy, I drink the usual prep, starting at about two o’clock. Believe me I have to start that early or I won’t get done in time. That night I’m in the bathroom a lot. As an aside, I suck on a lemon right before drinking my prep and I make sure it is ice cold. During the colonoscopy I’m on light anesthesia because I have tortuous colon. I hope you can have a successful colonoscopy. Please post again and let us know how you are doing.