Try even harder, how bad do you want to become a nurse? If its your dream to become a nurse, then show it. I can't stress that enough, try other methods of studying if one does not work. If math is your main problem, then practice, practice, and practice.
Im not into math either, and i hate it..but thats one subject, i practice more than anything and I aced all my math clases b/c of it. Its required for nursing. In Nursing school, you will do med calculations w/out a calculator (you need at least a 90%) . So train yourself, be ahead of the game. Learn why your making errors and try to correct them. Give yourself tests and quizzes each day. Do homework, even if its not due.
Sharpen your math skills skills. I took chemistry in HS (taking it in the summer now), and i remember that in class, we had so many formulas to memorize. So the problem wasn't the math, but conversions,/formulas.
I wish you all the best..