"Your" doctor may be doing you a favor. You and her obviously don't agree on what sort of testing and treatment is necessary, and absolutely no good can come of that. So why would you want to see her in the future? Better for both of you to part company than continue a distrustful relationship.
Assuming that you weren't physically removed from her office, but instead just told that she wasn't a good fit as your doctor and you should find another, then I honestly don't see it as unethical for her to ask you to find another doctor, Disappointing, of course, but doctors are under no obligation to share a particular patients views, and it is better they are upfront about it than dismissively nod their head and play along just to get along.
I once had an allergy doctor tell me: "In this office we give allergy shots. If you want something else you should probably go somewhere else." I thought that was excruciatingly honest by the doctor, and I followed his advice and never looked back.