Slinky, it could be several different things, some not so serious..going through some similar issues. I may the strange one, but I actually enjoy the whole colonoscopy experience.. I agree with po10ial, try to fast or clear liquid diet the days before.. the cleanse was very refreshing! The best part is the MJ drug they give you to sleep is the best! Try to chill afterwards too, nap if you plan on being out late!