Nasal congestion and sore irritation.

I have suffer nasal congestion & sore irritation also feel headache and muscle pain continue last 3 month. In April I test CBC report comes Hb - 14.6, TLC - 8.070, DC.N- 59 L-31 E-10 After 3 month I test again Hb - 14.0 , TLC- 7.960 DC.N - 59 L-32 E 09 am done the Covid-19 test in 10th May but result come negative after done oxygen saturation test & x-ray and ECG all are come normal but symptoms not change. I am done oxygen saturation check last week it's comes 99% I am already take medicine Montemac fx for 20 days and Alerfix total tablet for daily one month done but still not cured I already consult with ENT specialist he prescribed me to take one month after not changes do CT PNR but now in covid cases rises daily basics and all the hospital staff and doctors are affected by covid. So please help me to out overcome this problem & also told if nasal congestion not cured then is it happens any dangerous in future or not ???