I have only read all of your posts @TheObstinateHeadstrongGirl, so my reply might be irrelevant by now. However, as a wheelchair bound person I get very angry when lazy people park in disabled bays. I would not have been angry at you. I am a mother, and now also a grandmother, and at the end of the day, our own offspring are the most important people in the world to us, so when they are in a potentially life risking situation, they will always come first.
Your DD could have stopped breathing completely at any given second, and her life is definitely more important than mine - a woman in her 60's. Of course it could have been that a disabled child turned up 3 minutes after you, and was also in a life threatening condition, in that case they would have been just as entitled to that parking place, maybe even more so. But you were right there, right then, with a dire emergency on your hands, so of course you took the first available space. If I had been you I would have probably been even worse, and driven right up to the A&E's front doors - of course once my child was in the safe hands of a Dr, and once I knew they weren't about to die, I would have gone straight out and moved my car, and if it had somehow been towed away in the meantime, although I am poor, I would have happily paid any fine!
As for responding to the man in the way you did, you were probably being unreasonable because you said it was an hour later, so you already knew that your DD was not in imminent danger of dying anymore, so I think that maybe you didn't need to use the swear words, especially ones that are still particularly unpleasant for any children in the waiting room to hear. I like to think that I would have said something like:
"As you were obviously aware that my DC was treated straight away, did it not cross your tiny ignorant mind that maybe she was in a very dangerous condition? And as your DC has still not been treated, I can only presume that they are not in an imminently dangerous situation? Of course I am very sorry for anyone, but particularly children, who have to attend A&E, so I hope that your child gets seen very quickly now".
Ok, I didn't say I would have been polite - especially as his child was almost certainly not in a life threatening condition, otherwise he or she would have hopefully already been seen! Therefore I think that he did need to have it pointed out to him just how stupid and unreasonable he was being!
As for the pp who said that you should have called an ambulance, in your circumstances that would have been absolutely ridiculous 🙄 Just getting through to the correct part of 999 would have taken at least one minute, then you would have had to give your address and a summary of what the problem was, then, even if there was an ambulance ready to come straight away - and that is a very big IF - even if it was just 2 minutes away at the hospital, by the time it got to you, and they got out of the ambulance and in to see your DD, you would have already been at the hospital, and your DD would have already had a shot of adrenaline! Sometimes not waiting for an ambulance is the right thing to do.
I hope that they can quickly find out what caused that reaction in your DD OP, and that it is something easy to guard against. I am so glad that she is feeling better in herself, and please try to forget all about that unpleasant incident, the man certainly seems to be a prat!