I'm really concerned about what's been happening with my health. I had TB back in May 2020 and finished the treatment in November that year and I felt fine after but then in April 2021, I got COVID. Since then I've been struggling with low-grade fever, cold feet, severe headaches, neck pain, and this overwhelming weakness like my body will just give up if I do anything for more than 15 minutes. All my blood tests have come back normal, and Crocin and paracetamol didn't help with the fever. Naproxyn worked for a bit, but the fever came back. It's been over a year and things just aren't getting betterin fact, they're getting worse. In March 2022, my doctor started looking into other causes, but all the tests were normal except for this chronic empyema in the lungs. They started ATT in April, and things got better at first but then went downhill again. After a PET scan, they found the empyema was active, so I had surgery and started on second-line drugs based on the biopsy report. There's been a little improvement, but then it just got worse again. I'm really at a loss here and would appreciate any advice or insights. What could be causing this?

Pulmonologist opinion is advised to the patient.