Sounds like she may be nesting. Our cat did that over a week before delivering, I still don't know if she was just moving things around or what, LOL.
There is no way to know for sure how close they are to delivering. Some cats show big changes in behavior, some are sort of quiet about it until it happens. But, I hope the wait isn't long for you! Keep us updated!
Im getting impatient too! And Im a novice at the whole cat pregnancy thing. I thought it would be today the babies would be born..this morning Tinkerbelle was meowing, didnt touch her food, tummy seems extra large and there were ripples all over it (which I thought were contractions...must have been the babies moving).