How do you know?

So it seems that i may be going through a minor life criss. so this is the deal i know that after all this schooling that i want to be a doctor...an emergency room doctor at some fabulous hospital and saves life. But, the in between, the undergrad not so sure anymore. I am seriously thinking about changing my major. I had these thoughts before but i did not realy look in to it but now i feel like this is not me anymore. i mean i could major is something completely ou there like english (dont worry it wont happen i dont like writing papers) stay on the pre-med track, and still go to college . To get in to med school the main thing that they look at are the MCAT scores. If you have a good one you are pretty much good to go. This is the only standardized portion of the admissions process and it is an equal playing field that everyone is judged on. I mean these changes are not set in stone but i am DEFINTIELY seriously thinking about it. Who know i may be able to graduate early!!!