dear user these symptoms of vomiting and diarrhea along with abdominal pain refer to viral or bacterial infection of your intestine....infection of the intestine has many causes according to symptoms the cause almost detected.....it was advisable to you to do blood test and also another test in this case is stool culture test ...stool culture is very helpfyl to detect type of organism causing as you may get infected with amoeba or salmonnela typhi or shigella or compylobacter bacteria or that should be managed with antibacterial drugs to get out your worry.... the most common cause of these symptoms is salmonella that cause typhoid disease....you shouldnot get worry or stressed of these symptoms as stress will decrease your immunity and cause symptoms to get worse....you should take plenty of fluids and rice soup and tea with little suger that helps improvement and do stool culture to detect cause and treatment begin simply......dont forget that anxiety and stress can cause these symptoms as it affect smooth muscle of intestine and cause more vomiting and diarrhea along with abdominal pain......i hope that helped you.... wish you healthy life