What Causes Severe Abdominal Pain Along With Diarrhoea And Vomiting?

I had a Lap Choly last Monday for a 5% injection fraction and havinf RUQ pain and food intolerance. The surgery went fine but since coming home I have progressivly gotten worse. My 3rd post op day I ended up in the ER for 4 hours due to Nausea Vomiting and Pain. I had a CT scan to make sure I didn't have a bile leak and the only thing they saw was some Gastritis, so I gor Protonix IV 40mg some pain medication and sent home after 2 liters of fluids. I have continues on with unrelenting stomach cramping (painful), Diarrhea and vomiting. I am taking Hycosamine for cramos, Zofran for he N/V, Pain medication, Ativan, and my regular meds. I went to the surgeon today and he states that my problems are not due to the surgery itself and that I should follow up with my Gastro Doc. I am eating nothing but protein Shakes, broth, and some soup at this point. I tried some grapes and am now in such pain I almost cant stand it anynore! I have not vomited but it may come soon. I get dizzy a lot, feel generaly crapy, get head rushes anytime I have to kneel or bend over, and cant sit up for long when the cramping really gets going. I am terribly bloated to the point that Im afraid I will pop my stiches. Any advice?