You poor thing, scary.
My dd fell off our bed (very high) onto floorboards onto her head, DH and I were in the room and I saw it happen. She was fine after crying for a bit but it took ages for me to erase the sight and sound of her head banging out of my mind. It was an extremely loud thump. I spoke to a paed and he said the first 4hours after it happens are the most high risk for problems.

I hope she is feeling better. (And you) xx