My advice would be to do a masters as part of your plan B. Ideally it’ll take you somewhere you can see yourself enjoying. They can be a lot of work, but you can get a lot out of them in terms of subject matter and skill development, and employment prospects.

I did an MSc, but I can’t say I would personally do a grad degree just to get into another program. Life is short and medicine is far from a guarantee, so IMHO doing stuff you enjoy and stuff that will support your life outside of med is always a good call, and honestly this usually has the side effect of making you a more well rounded person and more competitive future applicant.

My two cents anyways!