If you have been coughing, spitting up green mucus, blowing your nose, and experiencing headaches for the past 3 days, it is recommended to try using a product like Sinus Rinse™ to reduce the amount of mucus in your nose. You can use it twice a day for at least 5 days. This should help relieve congestion, headaches, and coughing within a couple of days. In the meantime, you may also consider taking Tylenol™ to help with any discomfort.