Hi ,I recovered from covid ,it's already a month , I took 0.5,mg dexona tab for 8days , and now after a month I am experiencing pain in head every evening from last 6 days.and nose blocks shifts from R TO L , light upper jaw pain and lightly in ear , sometimes I feel pain near sides of nose ...is this a black funcus ...head is not to sharp but feel pains both the side and pain in backside of head ...pls suggest about it