The quarter life crisis is surprisingly common - young people who had been told if they just focus at school/uni/first few years into a career, it'd be great, suddenly realising the career that they plumped for, often without really understanding what it entailed, doesn't suit their personality/the life they want to live, so they've only got a few years to shift to something else, and still have time to be established in that new career without it being too late to change.
So many friends went back to uni to do different post grad courses or started completely different careers at 26/27. Now we are in our early 40s, those early changers aren't that far off where they would have been earnings wise if they'd planned that career from 18, but are far happier than others who slogged away with careers that they knew at 25 didn't suit them.
Take the risk OP, just because you thought a Healthcare career would be right for you, doesn't mean it is. I bet you picked that when still a teen, it's ok to decide you want to do something else with your life.
If you want to stay in healthcare, it's ok to say not working for the NHS or even in this country. It's ok to start again elsewhere. This is the perfect time to give it a go.
can you take some time off and really think about what you enjoy and how you could reassess your career path?
...or failing that, go hang out with some rich single blokes and try the whole marrying for money thing? 