Chronic Cough , Sinusitis - PND, Lung.

I had Chronic Sinusitis, Lungs Issues and GERD. Now I have a nose blockage and persistent cough if i did not take Bilastine. I am not able to find the root cause of the cough and all these issues. Is this cough due to Post Nasal Drip(PND) or due to GERD.  Sometimes I feel PND dripping back from nose to throat when I have a chronic cough I did not feel (not sure this is related to PND , Sinusitis) Is this Cough  related  to GERD but when I had a chronic cough I did not feel burping .  Recently I have done PNA CT scan IMPRESSION:  ➤ Mucosal thickening in bilateral maxillary and ethmoidal sinuses with  internal Hyperdense contents  - S/O Fungal elements/inspissated secretions. ➤ Deviation of nasal septum to the right side.   ➤ Left inferior turbinate hypertrophy noted.  ➤ Right osteo-meatal unit blocked.  ➤ Mucosal thickening in nasal septum and nasal cavities  - Rhinitis changes. I have been suffering a lot for 3 years and did not have proper root cause.please help me Doc's