Can someone help, I'm in a lot of pain....?

While it is impossible to diagnose you without knowing your vital signs, you need to check into an urgent care facility ASAP. You need fluids and nutrients via an IV stat! You will get much much much sicker if you have not eaten whole foods and held them down for 72+/- hours. If you try to continue your normal daily life (ex: working) you will be victim to fainting and possible injury to yourself. Please see a physician immediately!!