First, I'm SO sorry you're going through this. It completely sucks.

I don't think I've ever had physical symptoms ignored because of BP. I can understand why you'd be concerned about it, though. ER staff are probably used to emotionally volatile people, BP or not. An auto accident is immensely traumatic regardless of any other circumstances.

Do you still feel unable to care for yourself? No shame in admitting this, by the way.