I agree with everything Imapatient said - can you see if pdoc will call Austin-T today or Monday?

But also, you've done quite a bit of hard work this week and I think it is ok to go easy. As far as dealing with that appointment, you could leave Austin-T a message definitively canceling the Tuesday appointment, but asking to reschedule. That way, he knows for sure that you aren't coming, but he also knows you are not quitting, and it gives pdoc more time to contact Austin-T and get things worked out.
Take care of yourself, dearest.