If you ask me- if you don't mind spending the 50 bucks- apply! Worst comes to worst you dont get in! Some people would say that applying a second time hurts your chances b/c you didn't get in the first time, I don't think so. Especiall in light of the fact that if you don't get in you will probably improve your MCAT during the following year any way making the fact that you didn't get in first round null!
Good luck in everything you do!