Gina,
I pray it isn't serious. I might have missed a post or two on this with your kitty, so, I apologize in advance if I am being too simplistic. One of my cats used to do this...and my way around it was two fold. First, I elminated 'beef' flavored wet food, AND I gave him his morning feed in VERY small amounts. Maybe I would give him a 1/2 tablespoon, and then ten minutes later, another little bit, then the next time, I would put all his food down. It cut down on the throw up alot. Not completely, but, alot. Good luck, and keep us posted.