Throat strain. Appreciate any advice.

I was tested positive for covid between 23 april and 22 may. I have had phlegm and mild cough since after my recovery. From past month i am feeling strain in my throat( similar to when we feel after yawning sometimes like tonsils got stuck ) . I feel similar strain whenever i sit taking back support. It gives mild numb feeling in my face and upper back sometimes. Since last 2 weeks i am having throat congestion feeling, pain near collar bone and tonsil and sore throat. Also my nose blocks due to congestion sometimes. Is this normal throat infection, tonsil inflammation, cold or something else. Please suggest any remedy . I am taking pulmoclear to clear out phlegm since 4 days. Appreciate any advice. Thanks