Iam having blocked nose , mucous coming through mouth , pain in the head that keeps changing from one side to another, blocked ears, lasting3yrs?

Sinus: This sounds like allergies possibly mixed with infection. You need to be evaluated to treated properly.

Allergic Rhinitis?: Given the three year length of your problem, it sounds more like allergy than infection. Have you consulted with your pcp or an allergist? Have you had a trial of a long-acting antihistamine such as loratidine? Your problem could be allergic rhinitis.