Sounds like she has a bit of an upper respiratory infection. Just watch her and if she gets worse, call the vet and ask about bringing her back in. Is her nose warm and dry? If so, she may have a bit of a fever. Naranj had a URI when I brought him home. He finally, after two rounds of antibiotics, managed to fight it off. My vet told me kittens are much like babies - they are born with an immune system meant to fight things like colds, etc.

And congratulations on your babies...if you have pictures everyone would love to see them!