I Have Had Several Sinus Infections Over The Past Year.

I have had several sinus infections over the past year. I have also had a chronic cough. At one point I had pneumonia. My family doctor has diagnosed via a CT scan that I have Bronchiectasis and I am on Symbicort for that. However, in the past 6 weeks I have had 3 more sinus infections. What can I do about this besides continue taking antibiotics?