Just a quick note to say hi!
I had a similar problem. I could not stop coughing for several (4) months, very servere coughing. Had to take off work---it was terrible. I had lots of mucus as well. None of the doctors I went to could tell me what it was. ENT, Pulmonary, Allergist, an ER doctors----I was put on antibotics and Prednisone which helped tremendously (helped dry the mucus). But Prednisone has side-effects. What I learned later was that I was having an alergic reaction to Hair Dye----which lasted as long as the dye was in my hair---Many people have this type of reaction---but dont know. In Europe such Dyes are restricted. So this is my story hope it helps.