Try the BRATY diet (bananas, rice, applesauce, toast and yogurt) once you're able to keep foods down. I like to cook the rice in veggie broth - makes it taste a little better.
Also, if you are actively throwing up do not drink more fluids. Drinking while throwing up will just dehydrate you faster. It will not only make you throw up what you've just had to drink but will also bring up more fluids that might have stayed down.
Wait at least an hour after the last time you've thrown up and try keeping down a tiny bit of water or crushed ice. If you can keep it down for 20 or 30 minutes you can try more. If you start throwing up again then start over waiting to try again.
Hugs to you - that totally sucks! I hope you start feeling better very soon.