MD is not "going all the way." MD is an extremely different career from RN. There are many threads covering the difference: eg http://allnurses.com/nursing-article...ot-536397.html
If you want a be a doctor, don't bother with nursing school. Go study whatever the heck interests you while getting good grades and med school prereqs in earning your BS.
If you want to be a nurse and later an NP, then finish nursing school.
I'm still in nursing school but in many clinicals both doctors AND nurses have told me "you remind me more of a medical student than a nursing student. Why aren't you in medical school instead?"
I don't want to put in the time now, in med school, in internship/residency/fellowship and then as a doctor. I want to have a major life outside the hospital. I want be able to switch specialties. I want to work 3 12s. Later I'll become an NP or a CRNA, but not right away.