Thanks everyone..
I have a hard time believing we will find her too...but I'm trying not to give up hope. We looked behind all of the tubs and even in the other tubs and under the rack. The room is kind of cold so I didn't think she would stray far from the heat tape but no such luck. I have even looked inside the paper shredder (ew....lets not think about that), we have emptied drawers and shelves and moved them and looked in blankets, laundry baskets, clothes.
We actually had a mouse get loose on Saturday...it scurried under the bed and it took 2 hours to catch it.
Bah