Maybe give up for a while
Arran,
I'm really sorry to hear about your experience - it parallels mine in many ways. I got as far as waiting for the final interview for the old BA Cadet scheme in 1991 while at University when the Gulf War sent my plans down the tubes. Like you I gave up on the dream, but only for 10 years!! Decided to start doing a PPL, then realised that buzzing around at weekends would never be enough and am now about 3 months away from finishing at OATS.
I really hope medicine works out for you, believe me it will be a smoother ride if it does! On the other hand I wouldn't be surprised if ten or so years from now you don't decide to resurrect the dream again as I have done!
Good luck and I hope whatever path you choose works out for you.
Desk-pilot