As a cat owner I wouldn't worry about it unless she doesn't eat her regular food later. Cats can safely go about 24 hours without food, longer than that constitutes and emergency. So just wait a bit and feed her normal food later and see how she does. If she eats it, no big deal.

My cats are always throwing shit up and it's fine as long as it's occasional and just one or two. If it's a pattern and or they aren't eating then it's a big problem