I do not know this first hand, but I heard from a counselor that there is a former student at my school who was rejected twice. She was a single Mom who worked full-time to get through pre-reqs and co-reqs with (get this) a C average. She might of had a few Bs in there somewhere... In any case, she finally was accepted her third try and is a nurse today (I do not know if she is a LPN or a RN).
I need to qualify this with the fact that the competition over past 4 years at my school varied. Some semesters the school admitted 4.0s and so someone like her would not even get a second look. While other semesters did not receive many applications. The Semester she was admitted was one of those where the competition was not stiff and practically everyone who applied was admitted.
Is it possible you will get in without doing anything? Sure, if the competition does not receive more points then you.
Today, the nurse I am talking about would not have a shot as a student at my school. Not this semester, not next semster... not any time soon over the next decade.
The reason being, the competition has geared up and there is no sign of it slowing down. More applicants apply every year, and so more are rejected every year. Many are dedicated enough to re-take classes (she was not like that according to my counselor) to improve his/her points.
Is it possible to re-take classes to improve your GPA since this seems to be the major concern and why you continue to get rejected? It is not you, it is the competition. And so you need to do everything in your power to max out your points to beat the competition the next time.
By the way, I also agree with the above poster, do not give up. If possible apply to other schools. Good luck.