You sound like you've already made up your mind, but I will add my 0.02 worth since I am here
If you are not absolutely committed to being a nurse, then don't take the spot of someone who is. Nursing school is no easy path to anything and you are most certainly not guaranteed a job on graduation (or any other time for that matter). While many areas of nursing are more "medical" models than others, there still is a different focus to each.
At your age, I would get into a premed track, take lots of biology, chem, physics, etc. Focus on the hard sciences and work toward taking the MCAT. If there is a fairly young doctor you can talk with about the things you should look toward and can give you some ideas about how medicine is changing, you might have clearer focus.
There are hoops to jump through and problems that plague any profession, but if you want to be a doctor, then why would you do anything else? I was in school with a young woman who really wanted to be an archeologist, but thought she could be a nurse first to fund her true passion. She flunked out during her second clinical rotation.
This dilemma is like saying you really want salmon for dinner, but the steak is on sale so you get it instead. It fills the belly, but is not really what you wanted.
Life is way too short! Go after what you really want!