[quote=Fabricant451]
I've had a lot of water today. I haven't eaten for fear of not holding it down.
[/quote]

Well, you may either throw up or your body might be telling you it's hungry as well. Once you wait too long to eat your stomach starts to shrink up and yeah, it can make you feel nauseous. If anything, just eat something really dry or like a piece of fruit... maybe some brothy soup. That shouldn't upset your stomach.