I really am sorry that you're having a tough time. However, I cannot describe to you how easy A&P is in comparison to nursing school. Unfortunately, some people don't get into nursing school even if they have B's in A&P because nursing programs are incredibly competitive. In my program, if you don't make 80%, that is an automatic failure of the exam. It's an entirely different level of academic difficulty, and you might want to reconsider nursing if you're having this much trouble now.