Since you have an infection I would suggest you to change your antibiotics.
Pleural infection will not resolve with azithromycin as the dose is not sufficient. You can continue brufen or other nsaids for pain. However it is important to add a antihistamine to control your cough and chest congestion. Also you might need nebulization to clear your airways.
Next Steps
Change your antibiotics, add a antihistamine. And review with a Doctor.