Often times when they fall they will limp a while like they have just landed the wrong way so it hurts a little for a while. Since she was up & running around with Vlad a short while after she's probably fine.
If tomorrow she is limping a bit it is likely she just a tweaked muscle or has a mild bruise, same as us when we fall or bump into something, may be sore for a couple of days.
If there is any signs of pain (wincing/meowing/trying to bite you when you touch her leg
) when you feel her leg/hip then you should keep an eye on her for a day or two if it lasts longer than that you may want to bring her in.