Just because other people have said it's bad doesn't mean it's actually bad, everyone has different opinions. Personally I would resit my exams so I could get into Medicine at university, you will be doing that course for 3 years!
But if you really think you could do pharmacy and enjoy/like the course then go for it!
Resitting your exams to get into Medicine is going to mean a lot more than having to do pharmacy that you slightly like for 3 years!