I've had post covid symptoms door over 2 years. Tight chest and phlegm. Every pcr test comes back negative.my x-rays are clear and so.are my CT scans. Even my lung function test was fine.

I've read in one if you're articles that covid virus can infect areas of your lung perpetuating Immunoreactive responses from the lung while testing negative with pcr.

My question is, if the may be the case with me, would my scan return clear? If the virus is hiding in the lungs would the blood tests for covid not detest what the pcr could not?
How do I tell if covid is hiding in the lung cells and how can I treat it?