Chest Pain at left side. The matter.

My mother is having chest pain since January 2017 till date. All the blood test i.e. CBC, LFT, KFT, E CG, Ultrasound ABDN, Thyroid are negative, except X-ray which shows infection in the left lung. CT scan states that upper left lobe is collapsed. No heart problem, no sugar problem and no BP problem. Based on the recommendation of the Doctor medicine i.e. Macox Plus, Pyzinia 1000, Combutol 800 & Durapain are being taken since last two months. There is no finding in the Bronchoscopy. AFB Negative, Sputum Negative but only X-ray shows infection is increasing even after taking the above medicine for two months. Sometimes Chest Pain is little bit decreasing (occasionally) and as per the doctor (by seeing the X-ray done after taking two months medicine) infection in lung is increasing. As of now, my mother is feeling weakness and also not eating properly. May please suggest any further action if any or wait till the medicine respond so that any improvement can be seen the matter.