Switching out of Medical School

I am a first year medical student at a high tier state school. I have begun to realize that I pursued medicine simply because of the academic challenge and financial stability it offers rather than it being what I genuinely want to do.

I have always had an interest in finance, which is why I chose to major in it. I graduated college summa cum laude (3.94) with a major in Finance and minors in Biology and Chemistry. However, due to my medical school ambitions throughout undergrad, I have no work experience in IB or PE; I spent my summer and winter breaks volunteering, working in hospitals, and performing research.

I would like to work at a healthcare-focused fund and think I have a somewhat unique story. Is there any way that any healthcare-focused PE or hedge fund would hire someone with no work experience in the field? Should I try to obtain an MBA and then bust in? For what it's worth, my grandfather was the managing partner of a PE firm before retiring several years ago. I have no interest in in using nepotism to land a position at that firm, however.