@ kc261 - thats great news. Yeah instead of seperating the pregnant female, I just seperated the other mice and let the pregnant one stay where she has been this whole time. I didn't want to stress her out too bad.
I am pretty sure she is going to give birth within the next 7-10 days, because she is digging holes (nests?) and she keeps bringing shredded newspaper into her little hide (like she is preparing for warmth in her nest)
this is pretty exciting. my first litter coming up! (and I wasnt even trying for this one to get pregnant, haha)