need quick hangover advice

Today's my 21st birthday, I drank too much last night, I have a final in one hour, and I'm going out with my friends to celebrate in like three. I *REALLY* don't want my current hangover to kill my night tonight (I don't really care that much about the final, it's an easy class anyway, it just limits the time I have to recover).

I've been drinking water all day, haven't eaten much (don't have the stomach for it). Would throwing up make me feel better or worse? I'm staring at a pizza, and I want to eat it, and I'm hungry, but any time it goes in my mouth it triggers my gag reflex - should I just give in and throw up, or would that make me feel worse?