How horrible that a doctor would treat you that way! Without a doubt, I'd find a new doctor, and I'd make a point of telling the old one (and her HMO or any hospital she's associated with) exactly why.
Whatever you do, DON'T STOP FIGHTING FOR YOUR HEALTH. When I suddenly lost the hearing in my right ear, I was given antibiotics for a "hidden" ear infections and various other non-cures for two months before I was finally referred to an ENT. ENT said, had I come in right away, steroids might have brought back my hearing, but after two months, it was too late.
After an exam, he said that sometimes sudden hearing loss "just happened" and that I'd have to learn to live with it. Luckily, the audiologist had mentioned that my ear drum was not moving at all. So I demanded an explanation for that, and the ENT very grudgingly ordered an MRI. He also promised me that it would show no problem at all.
Boy, was HE wrong!
Stand up for yourself, and if your doctor doesn't have the time or inclination to listen to you, find someone who does.