Phlegm since 1 month. In green. please!

Sir I am suffering from getting lightly phlegm in my throat from 4 months. Meanwhile, at the beginning days of corona virus lockdown, I used to place the tissue papers in between the kerchief and my nose at my duty for 2 days. I replaced this tissue paper at every 2 or 3 hours.Then The third day I had chest pain, throat pain and getting more and continuous phlegm than before. From that moment I never used tissue paper, But I am getting more  phlegm continuously.So I went to two  medical shops one after one. I did not not finding any cure. they gave medicines respectively [ Amoxycillin 500 - 02 No, Intase /incoff forte - don't know the name exactly sir - 02 No, may be it's incoff Histan B - 02 No] { Kuffdryl - 04 No Amorax 500 - 04 No } Except the starting two days, till now I don't have chest pain, throat pain, sneezes, running nose. Only I am getting more phlegm and sometimes cough. I need to go to spit it out at every 1 minute.That phlegm is not a thick and not in green.please