Well, here is what I would recommend since you're so young and haven't completed your pre-req's yet...
Transfer to Linfield and complete your nursing pre-req's there. It's expensive, but you'll be sure to get into the nursing program in a timely manner as soon as your pre-req's are finished and won't have to compete for a spot against people who are older/have previous degrees/are more diverse, etc. You won't have to stress about getting A's in all of your pre-req's, although I still highly recommend it - all you have to do is pass the classes and keep the minimum GPA requirement to be able to get into the nursing program. (Again, I still HIGHLY recommend that you get good grades, I'm just emphasizing the point that it's not critical that you get them because you'll basically already be accepted into the program). You'll end up getting a Bachelor's degree which is tremendously helpful in being able to find a job and move up in the workplace and you'll be able to pay off your student loans within a few years because you'll be making a great income. You will set yourself up for life!
If you were my child, I would strongly recommend this path. It's more expensive than going the community college/OCNE route, but it'll probably be faster and more do-able... and you won't have to worry about whether or not your application will be accepted. If you go the other routes you're going to be competing against people who have more life experience, have previous degrees, more volunteer experience, etc.... it's really difficult for someone so young to get accepted into the programs. But, if you go the Linfield route, once you're in the Linfield pre-nursing program working on your pre-req's you're in! I am 99.9% certain that you will not regret it if you truly are committed to becoming a nurse!
Here is the linfield pre-nursing info: