Is it 5 years SINCE you took your last science courses or have you been taking some science courses or maybe science-related research in the meantime?
5 years is a long time without any science. Probably should do post-bac or something for a year and take Physics, Bio, Chem and O-chem and then spend 3 months to prepare for the MCAT afterwards. If you time it right, you can do all of that and apply within a matter of 2 years and possibly get accepted and stuff.