Is a master's program worth it in my case?

I’m graduating in May with a B.S in biochem and have not taken my MCAT. I plan to take 2 gap yrs to study for my MCAT and continue my clinical experiences. I’m currently an EMT & ER Tech and will continue these experiences during my 2 gap years. I have a 3.4 sGPA & a 3.5 cGPA, is a masters program/SMP/Post-bac worth it in my case?