Hi. Thanks for your query. Noted the history and understood your concerns. Stomach discomfort with pain in abdomen with diarrhea, nausea, headache and fever are suggestive of an intestinal infection that needs the following: Consult your Doctor for clinical evaluation, examination and investigations of the stool and blood. To get the symptomatic treatment with a PPI like Pantoprazole, Domperidone and definitive treatment with an antibiotic active against intestinal infection, Metronidazole and probiotics. Take paracetamol if the fever persists. Consume only boiled and cooled water in plenty to avoid dehydration, fresh homemade foods only of there is no nausea or vomiting. Take electrolyte solution to maintain the electrolyte balance.