You may be causing a more serious problem than you already have. Don't bundle up to sweat out a fever. It only increases your temperature. A void products containing antihistamines for your cold symptoms. They may cause excessive drying and make secretions too thick for the body to eliminate.
Antihistamines are more helpful for hayfever-like symptoms.
Avoid nasal sprays unless they are prescribed. If you are prescribed an antibiotic, be sure to take it until it's all gone, not just until you feel better. Don't spread your cold. Wash your hands often. Colds are transmitted by carrying viral droplets from a recently contaminated surface to mucus membranes with your hands.