New pet rat sneezing problems?

I just got a new rat today, and she is sneezing and sounds just slightly congested. I have her in quarantine from my other rats, but I don't know if I should get her treatment or if her sneezing will get better on its own. At the pet store she was in a small gl cage with pine bedding, so now that she's in a better cage with carefresh will it get better? Besides that she's eating and seems pretty healthy, I'm not going to take her back.