Have you ever been to an emergency room? If not, there is no way any sane person would choose going to an emergency room rather than their own doctor. My wife went to one a few months ago. We were there for about 16 hours, it cost $10,000, and there was (fortunately) nothing wrong with her.
If that is your ONLY option, fine. Otherwise, a visit to a GP is much-preferred.
I guarantee you that I have spent more time in the ER than most FReepers. IOW, one helluva lot. I have witnessed what I wrote about.