Hang in there, I'm in the same boat... restaurants make me sick in general because of all the combination of smells :S which I am very sensitive to lately...
I hope you can soon eat, what I've been doing to ease the nausea is to never go to sleep on an empty stomach (usually the only thing I can down in some yogurt or fruit) and then as soon as you wake up, drink some milk or yogurt. Sometimes I force myself to each some crackers and it also helps a lot.
But it could be worse, at some point I got nausea + heartburn and that was a combo! x.x