Blast, we went through something similar recently with our 3 year old. It wasn't that he wouldn't take water, but that he couldn't keep much down. There's a suppository to help with the vomiting, and my guess is that with vomiting and sore throat, that's one reason your girl didn't want to drink.

pedialite often tastes kinda nasty to kids if they aren't used to something similar. You can try freezing it into popsicles, giving ice chips, breaking up popsicles into pieces, things like that. When sick, clear liquids are best (nothing like milk).

I'm not sure you can do much. A large bulb tip syringe (you can get them at any pharmacy) could be used to irrigate the sides of the mouth, but sometimes as parents you have to force a child. Trust me, it's no fun - and a three year old fights against it a LOT.

I feel for ya...