I, too, have a constant post-nasal drip along with the feeling of phlegm in the back of my throat. I also have had a chronic cough since covid (march 2020). I went to the ENT at about 6 months in for all things ENT - drip, phlegm, cough, ear pain and hoarseness. He said I did not have a post-nasal drip, phlegm, etc. I was shocked! I said it was there right now and that I could feel it running down the back of my throat.

I do not understand LC at all.