Caffeine Feind

I'm in an odd mood today. Kind of edgy for no particularly obvious reason. I'd say that what I actually feel is overcaffeinated, but that can't be it. So far today, I've only had my usual three cups of morning coffee, two mugs of tea, and half a bottle of Pepsi. That shouldn't be remotely enough to have an impact on me.

Oh, gawd. I really am a hopeless caffeine junkie, aren't I?