That wasn't such a good move, Moto.
If your job was so unpleasant that you could call your boss that c word and then walk out, it wasn't a job worth holding onto. You should have resigned and kept things as amicable as you can. You're going to move into the health sector and there's no telling what sort of references and previous employers they are going to check. It's not worth the risk that this dude says something at a later date that comes back to bite your arse. You need to manoeuvre carefully. Take note of the following:
1) When you work in a hospital, you are subject to intense scrutiny. If you have even the slightest smudge on your record you probably won't get hired. This means previous employment AND the criminal background checks.
2) The Trust (as an employer) is not sympathetic when it comes to you justifying poor conduct by insinuations that your actions were as a result of a breakdown. That's a double failure: the conduct and the admission of a critical weakness. Regardless of how these guys have treated you, you can't behave like that and expect to get sympathy from a prospective employer.
3) You absolutely positively CANNOT pull a stunt like that in a hospital. You'll have a very short career. Trust me, there is a lot of stress in a job such as the one you want to do. A future employer will look at this and ask whether it is worth training you for 3 or 4 years if you have this volatile nature.
See what I mean? You may well have legitimate claims against your boss and company, but failure to follow proper procedure is a greater evil in the eyes of the prospective employer, than the events that lead you to walk out.
Sometimes you do have to put up with crap, or gracefully ditch it and start something else.
What you did was an own goal.
