Hi, Thanks for posting your query. With the available described symptoms, there could be possibility of acute bacterial gastroenteritis. Presence of body ache, watery diarrhea and gastric upset suggests the diagnosis. You should consult with internal medicine specialist/ gastroenterologist and should go for thorough check up. You should go for complete blood count, serum electrolytes and renal function test. You should take complete antibiotic therapy, probiotics, antispasmodics and muscle relaxants. You should maintain your hydration by taking potassium rich supplements. Avoid milk and all milk related products such as cheese and butter. Take care, Dr. Mayank Bhargava