A few weeks ago there was a "what was your worst case of diarrhea" thread that I posted to. Your experience sounds very much like mine, especially regarding "peeing out your pooper".
"Sports drinks" like Gatorade, which claim to replenish your electrolytes, are your best friend. Drink lots of them. Have friends keep an eye on you in case you get too dehydrated to function -- you can pass out, or worse. You'll need to eat some solid food just to keep your energy up, but take it easy. White rice is easy to digest, especially if you cook it into mush. Anything you eat, be sure it's well-cooked until anything in it is definitely dead; you don't need to get a second bug.
You probably should go see a doctor, just in case. Diarrhea lasting more than a couple of days is dangerous. Mine lasted about five days.
One thing -- the usual OTC antidiarrheal medicines like Pepto-Bismol warn against use in some cases. I think "more than a couple of days" is one of the "don't use" criteria, IIRC. I took one dose, started bleeding internally (little blood clots coming out along with everything else), and quit.