Hey, I've worked six years on a surgical floor and then about two years in emergency in Canada. If you really have that desire and drive to become an MD then what harm is there in applying and trying? I have multiple colleagues in the emerg department who ended up writing their MCAT's doing extra courses and have successfully gotten into medical school. I would advice you to work a bit in the emergency department, you work closely with the doctors and learn a lot. Just don't let time pass you by, time is money and you should figure it out sooner than later.