Postbaccalaureate program program or Masters Degree in M.S.?

Hi Everyone, 

I am a non-traditional pre-PA student majoring in Medical Anthropology. I have taken the majority of my prerequisite classes before transferring to my university; however, my overall GPA and science GPA is only 3.07. Although my university GPA has shown an up-trend as I currently have a 3.90 at my university, I still do not think I have competitive stats. 

As of right now, I have 250 volunteer hours, 60 shadowing abroad hours from Italy, 350 PCE hours, and I am currently shadowing a PA. I graduate in March so my plan is to complete three more prerequisites (Anatomy, Physiology, and Microbiology) at a CC. 

My question is would it be worth doing a post-bacc program or should I do a Master's program in Medical Sciences to be a more competitive candidate? I would appreciate any advice as I am a first-generation college student with not that much guidance. 

Thank you!