Mad at the world

Have you ever gotten up in the morning and found yourself in a really bad mood? I did this morning and I'm really not sure why. I've just been kind of pissed off all day.  Hell there are lot's of reasons why I could be pissed of but I can't think of anything specific that set it off. Went to bed at a decent time, got some help to fall asleep, and had a good nights sleep.  So I don't get it because I'm pissed at the world right now. I just hope I get a good nights sleep tonight and wake up feeling like my usual jolly self.