You DID NOT fail here. You're LEARNING. Which is a SUCCESS.

Clearly a lesson here is that you don't have a great interest in being a medical professional. That's GOOD because you're learning what your career interests really are.

>I can either reapply or try to find another path. But I feel incredibly burnt out.

That's normal. Its okay to feel frustrated sometimes while working toward bettering yourself.

>How do I get myself motivated again and seriously evaluate what I want?

Suggestion- you will likely be more motivated to achieve a career path if it's something that you feel will make you happy to pursue.

There's a career resource called O*Net. You answer some questions and it allows the resource to create a basic psychology profile of you and then suggests career paths that people who fit your profile report having a high level of happiness pursuing.