pinocytosis, plasmodesmata, facilitated transport?

as of now, i am a full-time student at augusta state university in the pre-med program. my major is biology and i'm aspiring to become an Ob/Gyn...
yeah, about that...
i went to the first pre-med meeting of the year and there were about 15 representatives from MCG present. about ten were from the admissions committee or specialized departments. and five of the representatives were students. one was a first year student, one was a second year, one was a third year, and two were fourth year students. basically, i'll give you a run-down of what was discussed in this meeting:
around 2,000 people apply...230 are accepted.
while i am a 12-hour student and considered full-time now, a full-time student in med school is a 36-hour student.
the students that are accepted have hours and hours of volunteer and shadowing work.
the average GPA of the students enrolled in MCG is 3.7 and the average MCAT (Medical College Aptitude Test) is 39. the highest you can get is a 45....and if you get below a 30, you shouldn't even apply.
also, the students don't have jobs; they can't. medical school takes everything in them and they do not have a social life...
am i really smart enough, or driven enough to be accepted into medical school? do i have what it takes to be one of the 230 kids accepted out of 2,000? i don't have good study habits; i don't have good time-management. i want to be a doctor...i want it so bad, but do i want it bad enough? would i give up my life to become a doctor? or should i just become a high school english teacher?
the answers to all these questions: i don't have a clue in the world.
and this, this is the part of my future that scares me. what if i'm wasting my time right now in undergrad school? what if i'm killing myself over calculus and 7th level biology only to decide in a year that i can't do it? what if i let my parents down...what if i let myself down?