I think the best thing for you in this case would be to try and get some medical work experience, as this could end up shaping your views on the profession. If you don't really enjoy it, then going for medicine seems a bit redundant, whereas if you do enjoy it, then it could make your decision a bit easier.
Don't forget medicine courses last anywhere from 4-6 years, so you also have to think about whether you'd mind these extra years if you were to go for medicine. Which subject area do you enjoy the most?