You should take over-the-counter painkillers like paracetamol or ibuprofen to help with fever, headache, and body pain. Gargle with warm salt water or use throat lozenges for your sore throat. Drink warm fluids, rest well, and use a humidifier to keep the air moist. If your fever stays high, you have trouble breathing or swallowing, or your symptoms last more than a week, please see your doctor to check for a bacterial infection.