I got a second opinion from the same clinic once. I had a younger doctor prescribe me some pain meds I was fairly sure were going to react with my AD's. When I got home I checked (thanks dr google) before I took them luckily. I then went back spoke to a different doctor and put in a compaint against the first. Had I taken those drugs I could have gone into a coma or worse.

If a Dr is behaving, referring or prescribing incorrectly its a good idea to report it as others may be affected worse than us as they aren't on the ball.

And yeah, intestinal bleeding usually involves pain, and dark stools (TMI sorry)