you are still young so by all means go for it. However, I was a devoted pre-med for many years (which makes me an expert lol) so don't be fooled into thinking that you will be able to have a nursing job as a med school student, you simply won't have time.
Check out SDN, (student doctor network) it is the MD allnurses.com equivalent. Put up your stats (GPA etc.) and people will comment and let you know what your chances look like. Also, medical school is INCREDIBLY difficult to get into. Many people spend years after their undergrad taking the MCAT, volunteering, obtaining LEADERSHIP positions, fixing their undergrad GPAs, and going through the time consuming and emotionally draining application process. Also remember that Med school may be four years but depending on your specialty, you will also have to go through internships (barely paid), fellowships/residencies (paid about the same as nurses in many cases). This means you will not start making above 100k for several years AFTER you graduate from med school.
My point is... if you want to become a doctor make sure you are doing it because you want to be a doctor, not because you want $$$ or prestige; you will pay a very steep price.
Hope this helps, and good luck