well, i vomit quite a bit. haha. so ive run the gamut of types...
if it came up dry, and you are not dehydrated, it might just be that the food didnt even get to your stomach to churn up. often when this is my case, i feel "off" soon after i eat....either too full, or not digested enough, etc...then soon enough, it will come back up like no digestion took place yet at all, even tho it could have been hours later.
sometimes sipping water helps after i eat, but try not to overload the amount of water before or after you eat.