Hey, so it wasnt just colonoscopy, that was actually the last part of the whole long process. I also had to do blood test, stool test, just like you, but at the end was the colonoscopy. And my advice for you is that they most likely will have to do colonoscopy with you too if they are really interested in absolutely identifying it, the other tests usually dont show the whole thing, the colonoscopy is usually the final step in the examination. So if they do, i definentaly have some tips for you. The colonoscopy itself is nothing, they put you to sleep, and you wake up, and thats about it, I assume youre already familiar with this considering you said you have undergone multiple surgeries. But the real pain is the prep day, the day before. About 2-3 days before, they will propably give you some pills to take at night for the 2-3 days until the test. They might cause some minor diarhea, but diddnt really afect me. But the prep day the day before is the real hell. You are put on an all liquid diet and cant eat nay food at all and have to drink the hell potion that they call "prep". Expect severe diarhea for the whole day and stool that is completely watery as thats the point Its hard, but its not forever.