Hi. Thanks for your query. Noted the history and understood your concerns. Waking up with body ache, chills followed by diarrhea indicate severe intestinal infection unless proved otherwise. I would advise you the following in such a situation: Send the sample of stool for tests. Blood for CBC, Sugar, liver and kidney function. Ultrasonography of the abdomen. Clinical evaluation by your Doctor to get the gravity of situation to see for signs of septicemia, particularly the gram negative as fever may not be present. Get started on proper antibiotic, metronidazole, probiotics. Get admitted to the hospital for ongoing clinical examination and proper treatment with intravenous fluids as needed. Drink only boiled and cooled water and have fresh home made food only. maintain hydration well as well as the electrolyte balance.