Crisis averted! Phew! My hubby was helping look, and he did a "man-look" in my laptop bag. I decided it was worth rechecking, as I have found many a thing in places that he has already 'looked', and sure enough, there it was!
The scariest part was when I pulled a piece of curled over paper out from the back of the desk and it had a massive red-back spider in it! Eep! I HATE spiders. I've had to squish far to many lately - time to get the house sprayed!!