Be grateful.  Imagine waking up and not knowing where you are or how you got there. Nothing looks even remotely familiar.  Imagine hearing your name and not knowing who it is that is talking to you.  As you drive to work or school or on errands imagine not recognizing or remembering the nice lady at the coffee shop, the area you are passing through, the house, the yard.  Imagine not recognizing your own room.  And then suddenly you do remember something..........the worst headache you ever had.......and then nothing else.  Be grateful.