How to manage pneumonia, wheezing, and chest congestion?

Hello doctor,

I am 49 years old. I am a non-smoker. My father was a chain smoker and I lived with him for 19 years. Before four months, I developed a mild case of pneumonia. As a part of this, I developed a wheeze on my lower right lung. Since that time, I have had varying degrees of mild to moderate wheezing, intermittently tied to a feeling of chest congestion as well. It seems to get worse whenever I catch any sort of respiratory cold, allergies, post nasal drip, etc. I went to a doctor last month and x-rays showed nothing. Breath volume test was somewhat inconclusive. The doctor prescribed Flonase to minimize any post nasal drip which does help for allergies but not when I catch colds. I am having a slight head cold right now and my lung issue is already flaring up again. I am really at a loss as to what this is or what to do next to get relief? Any advice you could offer would be appreciated.

Thank you doctor,

The wheezing comes and goes but never completely goes away. I only intermittently have chest congestion (when I am coming down with a new cold). When I am not sick and allergies are not affecting me and the wheezing is less severe. I have no shortness of breath, no palpitations, and no fever. The more severe wheezing usually lasts until the cold clears or allergies clear up. The wheezing is persistent. I'm not aware of anything that exacerbates it other than post nasal drip related issues from allergies or colds. I have a intermittent dry cough but, again, usually related to post nasal drip. I do not cough up phlegm or anything else.