If its just that course, its probably not you but the course material. Take it again. But this time get a tutor or join a study group (if you didn't before). I failed an Art History course, took it a second time with a tutor and got a 4.0. Never imagined that could possibly happen, but the tutor made it possible. Please don't give up because you failed on that one course. I bet you would make an amazing nurse. And honestly? Nursing school is TOUGH. My bf in grad school was a nursing major, and it was insane. That you've done as well as you have speaks volumes. I personally could never do it.

Don't give up.