hinder, I had huge anxiety before one of my classes too (to the point of stomachache and occasionally throwing up) I never sought medication though.
What REALLY helped was talking to someone who had graduated from that school already, she told me about the professors and their tiny little foibles and imperfections, and why they take it out on students, what is their forte and what is their problem, and what they admire.. so I could figure out what this professor really wants and managed to find a way to do that and then he was excited and enthusiastic lol!!
(I also did write affirmations where I exaggerated a bit and said, '_This prof_ is enthusiastic about my work etc' - and he really was, lol!!)
It also helps to take notes on what he wants and likes when he tells about these things, and to figure out what books are his 'bibles' (so you can see who he admires). Hope any of this can help-?