Am I over-worked?

One question:
Am I over-worked if I type in "Vogrin" in the ePhoneBook instead of the name of the one I really want to call and keep wondering why the line is always busy when I try to phone the number I get?
Am I over-worked if moreover I try to type in the phone-numer on the keyboard of the PC instead of my mobile and wonder why there's no ringing?
Am I over-worked if I finally manage to get through and don't know what I wanted to ask anymore?
One thing is for sure: High time for weekend!