Have I been abandoned by my Physician?

I have been calling my Dr. for over a week and there is no response. I am almost out of my medication. I call three times a day and am told that he is getting my messages. I have received no letter stating that he has "dropped" me as a patient. Without my medication, I could possibly have seizures or organ failure. Does he have the right to stop being my Dr. without telling me in order to give me time to find another Physician? Personally, I am afraid. I am afraid for well-being and the fact that I really like him as a Dr. I am in the state of Georgia and just need the facts, please and thank you.