Technically, how long does a hangover last?

I mean, really. Can I still be hung over or is it the lack of sleep thing that has given me this pounding headache? Then, to add insult to injury, I'm having to write a story about the Wachovia-Wells Fargo-Citi threesome for people who are actually smart and stuff. I mean, come on now. What does an editor expect from me? I'm still seeing things like this. Without the blurriness, this was the scene Friday night on Bourbon Street with a little parade and band playing, beads being thrown. *sigh* Now, what did that economist say about the banking industry? Ohhh yeah. In between the thumps of my brain, I think I got it.