I had a similar problem on Tuesday... ginger tea. It worked wonders. I think that's where the ginger ale theory came from, because the ginger part really stopped my stomach from going way into over time. I didn't vomit, but I was so nauseous and had the other end (sorry) so bad that I actually dropped my hair blower into the sink and still barely made it the 2 steps to the toilet.
So, get to a health food store and find the tea!
Other than that, crackers (the worst white flour ones you can find) and applesauce.