Babies are definitely more durable than you think, but if getting her checked will help the two of you, then I do recommend that. You both being stressed isn't good for you or her. We see plenty of babies who've fallen in the ER (I'm an ER clerk). I don't think I've yet seen one come in that was injured besides the small bump on the head, but it is helpful to parents to have the reassurance many times. That being said, if she starts throwing up tonight or tomorrow, I'd get her checked to be safe.
My daughter fell from her high chair (about 3-3.5 feet) when she was about 4.5 months and I freaked out, calling my mother to take us to the ER and she ended up being totally fine. If she was acting like normal, her pupils are the same size, no vomiting or anything like that then you're baby is probably completely fine. That being said, if it will help your anxiety then definitely take her in to get checked. It never hurts to be safe, and being stressed isn't good for you or the baby.
I’m sure she is just fine ! As long as she was acting fine before she went to bed I would not worry about it . Babies fall from much higher places all the time and are just fine Trust me I was a pediatric nurse for 5 years ! Also people drop much smaller babies and they are okay ! They are a lot more durable than you would think !