The case of the missing stamps

I have been in and out of this box lots in the last couple of weeks, my stash of stamps for card making. Went in tonight to make a few more cards and the stamp I want is missing.....hunted everywhere but can't find it. Losing one stamp is bad but I managed to misplace a stamp on Saturday between taking it out of this box and picking a coloured ink to use! I've stopped looking hopefully they will show up.