She may be experiencing pre-labor. How is it going now?
Unfortunately, I know nothing about birthing kittens. Let me see if any of the advisors for THIS forum are around. @StefanZ, @tulosai, @catwoman707, @Red Top Rescue, are any of you available to assist here?
Could she have the runs? Most cats void in prepration for the birth. Do you have a vet you can call and ask over the phone?
@mrsgreenjeens Do you have any idea?
More experienced ppl will be on-line soon.