Hi. Thanks for your query. Noted the history and understood your concerns. Since Doctor has said about viral fever, it is possible that the cause of pain in abdomen be as follows: Stomach flu that is affection by the virus of the intestine. Medications causing gastric upset or GI disturbance. Viral attack can cause pancreatitis as this is known to occur. I would advise you the following in such a situation: Yes, you should go to ER that is Emergency Room for clinical evaluation, investigations of blood like amylase and Lipase along with all other parameters of liver and kidney function. Ultrasonography or Contrast enhanced CT scan of the abdomen to confirm or rule out any particular disease. Get a symptomatic treatment like Paracetamol for fever, anti-spasmodic for pain in abdomen, probiotics and so on as required. Maintain fluid and electrolyte balance.