Hi Cuddles..
Re your post..Been there-done that..Fatigue is not always obvious but it can creep up on you and the big clue is do you think your concentration is affected? If so your probably suffering from fatigue that has been building for some time. The cure isn't easy. Take some time off if you can. I think you're being very honest and it's a damn site better sorting it than keeping going believing you're a hero cos if you have a problem you'll get no help from management, they'll just say you shouldn't have come in! My belief is that there is more to this problem than just roster formats, it's down to traffic growth, endless changes to procedures that have to be assimilated etc etc. Winter used to be a recharge period but that's long gone! Look after yourself and you're looking after the paying public.