Two years ago my son and I both went to the ER suffering from severe,severe sore throat and red swollen eyes (we each had one eye really infected).I told the doctor I had done some online research and concluded we had strep throat and pink eye... he was not happy to hear me say that. (I could tell by the look on his face.)
We both had a chest x-rays done but no throat cultures were taken. Doc diagnosed us with bronchitis and pink eye. Mind you, neither of us was coughing at all. (And I have chronic bronchitis and well know what it is!) In almost 40 years I have only been given antibiotics for my bronchitis twice (and that was because it followed on the heals of a bacterial infection already present.) We were given antibiotics and eye drops and sent on our way.
I still laugh about it because it was strep throat... the first (and ONLY-I hope) time I had it. I never want a sore throat like that again.
Yup, doctors don't like to be told what is wrong. That's what they went to school for.