Every night at about 3am my DH and I have started hearing SQUEAKING coming from somewhere very close to the bed. Maybe under the floorboards. Do mice actually SQUEAK? Does it mean there's a NEST nearby? I am 41 wks pg and this is not what we need right now!! Have seen nothing up there, though did have mice downstairs that I thought we'd got rid of. Have been awake most of the night because of this. Am scared (and tired).