I can empathize as I have the same issue. When I had sinusitis surgery 20 years ago it alleviated the problem in my right sinus but rendered my left sinus at about 80%. Since then my left sinus has gotten worse and is visibly inflamed. I was informed to take Clonazepam or an antihistimine. They are not long term solutions and no-one has had a real answer. Since it is just my one sinus and it is inflamed I am going to research balloon sinuplasty. Did you ever get an answer on your problem?