Definitely food poisoning, no such thing as the stomach flu.
Get to the hospital if you don't see improvement soon.
Are you running a fever as well?
Feeling chills?
Lightheaded?
Finger tips and toes tingling?
Whites of your eyes turning yellowish?
Get your butt to a hospital.
If you're feeling better, drink clear fluids only. Gatorade, powerade, etc. Also try to eat jello.
Next day try clear chicken broth (skim the fat off) add some white rice if you're up to it.
Next day bananas are good. Try fat free crackers to go wih your broth.
Do not eat/drink anything with fats or protein (meat, vegetable, fruit) as your body's going to do a repeat on you.
3rd-4th day you should be able to start eating regular food. You should really start to feel hungry by this time.