You're uneccessarily worried, I'm sure... check her nipples from time to time. A sure sign of imminent birth is a waxy, yellowish-white discharge. She will start nosing around closets or other secluded sites to nest and she may become quite a bit more affectionate to you and family members. If you're really up to it, you can begin monitoring her rectal temperature. Normal is about 100 to 102F. A sudden and pronounced drop in this temp preceeds birth by only a few hours. Again, entirely uneccessary, in my opinion...