I'm preparing for work tomorrow and can't find my C8

I've looked everywhere now and can only conclude I lost it at work or it fell off when I cycled home and didn't realise at the time although I normally would have taken it off when I got in and don't remember anything out of the ordinary.
It's not been stolen, we've not been burgled and I'm at a loss at to where it is. I feel bereft.
Fingers crossed it will turn up soon! Wish me luck!
EDIT: It was late when I got in and went to bed about 00.30 after a beer and with the children's schedules messed up what with the Christmas hols excitement and all, my 6yo was asleep with my wife in our bed so I ended up in the 6yo's bed and had put the C8 on a shelf on a bookcase in his room! My 9yo remembered seeing it there and went to get it for me when I was fretting as to its whereabouts! Maaan, I'm alot calmer now!