My advice...get the colonoscopy if your Dr. is recommending it. I have had diarrhea every day for 18 months now (not much fun!) and it started out like yours. I had a colonoscopy. The worst part was the prep the day before. You are pretty much in the bathroom for 12 hours and it makes your bottom pretty sore. The colonoscopy itself is not too bad. You don't remember a thing and you don't feel a thing. They put you ina kind of sleep. It's a funny feeling when you come out of it because you can't remember anything that happened. I was really nervous, but I'm still here. Take the advice of your Dr. Get it under control before it gets worse.