Regarding Sinus. What should i do?

Please tell about this problem the doctor. I used to have mild burning sensation for about 10 days before 23 April when I tested positive for covid. I though this may be the mild symptom but I infected from my sister. She got covid first. Then 26 April to 6 may there was medication going on where I was given omnacortil 10 for 10 days. Each tablet once in a day. It suppressed my pain but after when O tested negative some days after it started again. I went through endoscopy of nose where these pictures were sent by doctor. The doctor only gave medicine for runny nose and one acidity syrup. I never had acidity. The doctor said it is swelling in the left side. Pls suggest something about this. What should I do ? Shall be very thankful to you.