Hi James,I was disturbed to read what happened and I wish you a speedy recovery. If you can afford it it would most certainly be worth paying for the tests to be performed at a private hospital - they're pretty much all absolutely amazing in comparison with NHS hospitals and the standard of service you can expect to receive should be worth the cost - and one can't put a price on one's health.
In the meantime I hope you enjoy a rest and best of luck on giving up smoking - I'm sure it'll be worth the effort.
-Stephen.