Use a humidifier to moisten the air in your home and help clear your sinuses. Get plenty of rest. If your symptoms persist, and you're concerned about which decongestant is the best for you, talk to your doctor.
@burcidi-- I'm not a doctor but I think that they do help with headaches because they constrict blood vessels. This is especially true if the headache is caused by congestion of the sinuses or nasal passages because these can cause headaches as well. ...