Sounds like you are really depressed. Have you thought about talking to a counsellor? JMO, I would try to muddle through as best you can if you knew before that medicine is your passion. You are not always going to be on school and exposed to the behavior of students. And in RL, frankly these students will matter less. Your skills and being a good doctor will be far more important.

You also write English very well!

Good luck...