Personally, I would call her doctor, describe the height from which she tumbled, and let them advise you on what to watch out for or do next. Is your bed on the floor, or up on a frame? I remember reading online that if a child fell from a foot or so it was probably nothing to be concerned with, but any higher warranted a check-up just to be sure.
For your own peace of mind, I'd recommend asking for some help from a doctor to look her over.
And on 09/23/2011, we were three; husband, daughter, and me!