P.W.
Don't panic. Keep an eye on her and trust your instincts. She's probably fine.
When my third child was a baby, I was an exhausted basket case (hey, wait a minute, I'm still an exhausted basket case). You know the stage when they have just learned how to move themselves by wiggling? Well, three, count 'em three, times in one week I forgot he could wiggle, put him in the middle of our king size bed and left the room. I then heard the crash of him falling to the floor. And I seriously had never dropped a baby before.
He not only survived just fine but definitely does not have brain damage or physical impairments.