I ate lunch at work and a step dinner at home. my stomach starting hurting at night and i threw up twice, shaky, and hungry. my stomach still hurts.

Gastroenteritis: Sounds like you acquired a type of infection, either viral or bacterial from something you ate. Bowel rest, increasing clear liquids for 24 hours,than slowly increasing your diet to a soft "BRAT" (Bananas Rice Applesauce Toast) like foods will usually help you recover. If pain worsens or you do not get better, than see the Dr. Good luck