For your fever and cold, you can take paracetamol to reduce the fever and relieve body aches. An oral antihistamine like cetirizine can help ease your cold symptoms and may also help relieve the itching in your feet. If the itching on your feet is due to a localized skin issue like a fungal infection, applying an over-the-counter clotrimazole cream can assist. Please rest well and stay hydrated. Since itching feet combined with a fever can sometimes have various underlying causes, I highly recommend consulting a doctor in person if your symptoms persist for more than three days or worsen.