Throat pain with fever, body ache, and weakness after a cold drink is usually due to a viral throat infection triggered by irritation. Take proper rest, drink warm fluids, do salt water gargles, eat light food, and stay well hydrated to support recovery. Keep your throat warm, avoid cold items, and use steam inhalation to ease discomfort. If symptoms worsen, the fever remains high, or you feel very weak, consult a doctor for proper treatment.