What is your GPA?
Medical schools will look at your entire college and university record. They also expect you to graduate with your bachelor’s degree in four years. If it takes you more than four years to graduate this will have a bad impact on your chances to get accepted to any medical school.
You cannot “run away” from your current GPA by changing schools. As was already mentioned on another thread, there is a clearinghouse where schools can check and see which colleges and universities you have already attended.
The premed students that I have met rarely “enjoy” their undergraduate education experience. They stay focused and they work very hard to keep their GPA up.
You will get better advice if you give us complete information. If we knew which school you attend and what your GPA is that would help. However, based on the very small amount of information you have provided, it sounds like you might need to consider other career options other than medical school.