Ouch....I know what you mean.
I did that at my first show I attended. Everyone prewarned me about the lack of sleep. I didn't think of it at the time but I hardely ate either, not to mention getting dehidrated (that was during the day, not at the parties.
) That time I also came home with the convention crude that hung on me for about two weeks after the show. lol. Boy did I learn my lesson that first show. I am a lot more prepared these days. lol.... (Like that makes any difference...lol.)