Sounds like what I had before leaving Nottingham for the hols in December, we had a sickness bug going round here. Threw up 3 times in the morning (once after just standing up). Didn't eat for 12 hours. Trick is to sip water slowly more than anything, and if you do want to eat, make sure it's carbohydrate based, like rice, pasta or, as I suggested earlier, dry toast.
Another left field choice is flat Coke. Full sugar. Again, you'd have to sip slowly, but it is supposed to be a stomach settler.