I had to take it all 4 years!!!!!
It did suck though--we had one teacher who was a real witch.

My male gym teacher, who was also the wrestling coach, made us wrestle in gym class. We had to learn all of the positions or whatever, and actually partner up and have a match with another girl in the class, with everyone else watching

By the time I was a senior though, he had mellowed out, and would let us do what we wanted for gym class. Sometimes we would just go and lift (we needed to for track anyway), or play ping pong

I hope your parents and your doctor and your teachers can come up with some kind of compromise for you.