I'd wait and see.
From what I understand, there are two different types of pinkeye -- viral and bacterial. Viral is just like a virus; it will have to go away on it's own. Usually, a person with viral pinkeye will have a pinkish eye with clear fluid draining. The only thing you can do for it is use OTC Similisan drops to alleviate the symptoms.
Bacterial pinkeye is much more serious. Usually the eye is pinkish, swollen, and has a thick yellowish discharge. That type needs antibiotics.
Either way, there's really nothing you can do right now to prevent your dd from getting this. Fortunately, just being exposed doesn't mean she'll automatically get pinkeye.
I'm keeping my fingers crossed for you that she doesn't come down with it.