PT Injured Me: Now What?

[bfit]

I wrote a couple of weeks ago about how I was disappointed in PT. Now I've been injured. I told the PT that the first exercises he prescribed caused new and extreme pain so I stopped doing them. Then he said something to the effect that "If you're unwilling to do those exercises I will prescribe others". The other ones were more strenuous than the first, and he had me do 20-30 reps of each of them at the appointment so now a week later I can hardly walk, and I have burning and stabbing pain in my knee. He says there is nothing wrong with my knee and that I am not injured. It's like nothing I say is believed. I'm supposed to go on a trip in 2 weeks, and now I'm not even sure I will be able to go because of pain and lack of mobility. I am so angry I don't know what to do. I don't intend to go back, and I have an appointment to see my doctor. He is the manager of his office so I can't complain to the manager. Any thoughts?