I hope you call that first doctor back and say, "Hey, Mr. I've-been-a-doctor-for-23-years-and-I-know-everything, why didn't you diangose me with appendicitis while I was there? I saw another doctor, got my appendix out and now I am fine. Maybe you don't know as much as you think you do, and I guess *I* was the one who was right all along. After all, I've been in my body longer than you have been in medicine" and then hang-up. And maybe file a complaint against him. I hate it when doctors don't listen to their patients and treat them like they are idiots. That's not a good doctor. And what would have happened if you had just gone on and your appendix had ruptured or gotten seriously infected because you had listened to this quack?
I'm so glad you were able to get some relief! It's so important for people with IBS to monitor themselves and go back to the doctor when their symptoms change because it can mask other problems that develop on their own. I mean, just because you're a diabetic doesn't mean you can't also develop a bad gall bladder or thyroid problems or anything else; just because we have IBS doesn't mean we can't get bad appendices or hernias or ovarian cysts or anything else. I don't know but I think sometimes, when we suspect something other than IBS, and we're going to a new doctor, we ought not to tell the doctor we have it so he'll be more thorough in checking everything out and look at everything as a possibility instead of dismissing us, as happened to you.