Don't worry, it will pass, probably without you noticing it!! If she starts having severe abdominal pain, I would take her to the ER, but if she is acting like she is fine, then she is.
I work in a hospital, as an x-ray tech, and an ultrasound tech. We do xrays all the time on kids that swallow all kinds of things. If the object is small, not too sharp, and there is no pain, they will just let it pass.
That reminds me that last weekend a 40 year old man came in that had swallowed 3 nails... long ones! He had swallowed 2 nails in august, had surgery to remove them, and now is right back!!! some people are very hard to figure out... he was sent to surgery again, and he will be admitted to "the pavilion" once he is ready for discharge. The pavilion is what our hospital calls the psych unit!!! hope he gets the help he needs!!