Me, my wife, and my daughter (age 18 months) have been suffering from the same bullshit viral "bug" that you had. I caught it on the weekend. Started out like a regular cold. I had a pulsing headache all day, and chills. I just could not get warm. I went to bed with longjohns, and jeans. Socks, and slippers, and a t-shirt, with a flannel shirt overtop of that, and then the fleece liner out of my winter coat. Then I threw a duvet over myself and a heating pad under me. I shivered all night like I was badly dehydrated. That same night my wife woke up and started losing things from both ends. My daughter seemed fine, but when we fed her milk in the morning she instantly threw it up. She's been eating well, but only clear liquids are going into her right now.
It's Thursday, and I'm only just starting to feel normal again. I never ended up puking, but I did go through fire hydrant symptoms you spoke of. It's drained the hell out of the entire family. Oddly, my son has been immune. Every morning I wake up and go into his room expecting him to puke on me, but he seems to be coming out of this unscathed *knocks on wood*
It's this stupid virus shit that makes me wish I lived in Hawaii full time.