Hello dear I understand your concern You develop gastroenteritis. Diarrhea and vomiting cause lost water and cause chills and cold feeling. I would suggest to consult your primary care physician as early as possible to know status of hydration. Treatment should be decide after physical assessment. Antibiotics: ofloxacin + ordinazole twice daily along with probiotics Take over the counter oral rehydration solution to prevent the dehydration. Stay calm. Avoid solid foods. You can take boiled rice with added salt and lemon. This will help you replenish the fluids and electrolytes Drink plenty of water as you can Tablet pantoprazole plus domperidone on empty stomach Taken more chicken breast soups, yogurt,curd rice, banana, applesauce and toast. Hope this may help you Contact HCM for further health query Best regards Dr. Sagar