She might have been okay. It depends how she fell, how far she fell, and onto what surface she fell. She may have just been a bit shocked. But even though she seems to be doing well, it can't do any harm to have a vet check her over.
It's good that she didn't fall on her head. I do hope she will be okay. Continuing to feed is a good sign, I think. But please don't just take my word for it.