Pre-med vs pre-nursing

Here's what you need to do.

Pick your dream nursing school. Pick your dream medical school. Go to both of the websites, look up the program, and read all the requirements. GPA requirements, prerequisite course requirements, all of it.

If you change your mind about medical school, we cannot tell you if you'll get into nursing school, because we don't know if you meet the requirements of the school. If you don't meet the requirements, you can always try to do whatever needs to be done to change that.

So, to repeat. Go do some research. See where things overlap and the things that are different and your questions will answer themselves.