i'd say finish your bsn, and start studying for mcat. i once was there. finished by bsn and hated nursing. i loved the patient care. i loved taking care of people with balloon pumps, crrt, swans etc. but i hated the politics in nursing, the back stabbing, the paperwork, and never-ending nursing policies and protocols that came about from someone screwing something up. i hated the restraint orders, hated taking unstable intubated patient with chest tubes to interventional radiology for picc line placement, the hospital didn't want to train a nurse to do it at the bedside, so patient had to be charged for the inerventionalist time.
so i went to crna school, and have 9 more months to go. well it's better than bedside nursing. the whole charting is down to one page anesthesia record. one patient at the time. you don't have to call for the restraint orders. however, the anesthesia attending may walk in to your room at any time and tell you to change your anesthetic plan, regardless what you think about it. sometimes it works out better for the patient, sometimes it doesn't. you end up following orders just like an rn. yes, i know crnas can practice independently, but i'm training on the east coast, so i've yet to see an independent crna.
you need to find out what you don't like about nursing. if you don't like taking orders and want to be in charge all the time, you need to go to med school. if you want to be independent practitioner, you need to go to med school. no matter how advanced you are going to be as a nurse, you will be taking orders for the rest of your carrier. funny enough, the anesthesiologists take orders from surgeons.
bottom line, if you want to be a leader, go to med school. try to get in to us school, if not check out caribbean schools, i've met plenty of residents both surgery and anesthesia who graduated from foreign schools.
if i could do it again, i would most certainly go to med school.
just my 2cent