You're right about me being very angry and needing help.

I didn't blow up at the doctor. He really messed up his own billing with the insurance company, then while I had my appointment, instead of billing insurance like he was supposed to, he was asking me for full payment for each appointment instead of the amount the insurance was paying him. It was a mess. It was only logical for me to very nicely say that he needed to fix that problem and then I would return for more appointments. I never heard back from him.