I went through a similar experience about a month ago. I am not hypoglycemic, but going for long periods without food makes me very ill. The doctor scheduled me for the colonoscopy just because he couldn't really diagnose the abdominal pain that I have beem having attacks for 20 years. Very much like gall bladder or dying from a heart attack, Sometimes lasting days. Anyway he says along as your here and you ARE over 50 and have never had one, I should have one done. It was one of the absolute worst experiences of my life! I did the prep aand liquid diet, but not being able to take pain medication or migrane meds, was terrible. They started the test with no shot to relax me or for pain. I was screaming in pain. Then they inform me that the test could not be completed. They were only able to go 1/4 of the way, and that I had diverticulosis so bad. Then they suggest that I have a lower GI and then another colonoscopy because they HAVE to see what other problems may be in the colon. I politely told the doctor not to hold his breath. I told him don't call me. I really have to think about this one.