First of all, I'm glad that your girlfriend has recovered.
I have read most of this thread and what really confused me was the fact that your were in the ER, stable and waiting for medical attention and then LEFT! With your background and previous medical experience, I'm having a hard time with you not understanding triage.
Regardless of why the hit, and they can happen to anyone diving, even if you theoretically do everything correct. Obviously there were a number of things that were not done correctly, but thats for another thread.
It seems that DAN did what they were supposed to and your expectations were a little off. Again, glad the outcome was positive and it appears that the ER was correct. It was not life threating and could wait.
Just a little pick - Next time, break up the long opening statement with a few paragraphs. It will make it a lot easier to read.