You mentioned everything they have treated you with but not what they have done to find the source of the problem. What tests have you had done? Have they run CT scans of your sinus's? Did it show anything? Have they tested your immunoglobulins? What about a full Allergy panel? Until you find the source of your Chronis rhinitis and infections you will not find relief! see an ENT and an Allergy doctor ASAP! Good Luck!