Sinus problem. Change to black fungus?

Covid last month. Before covid whenever I used to go in hot son I feel pain near eyebrows, forehead. But not continuously. I didn't take any treatment for tha. Because no trouble at that time. But now almost one month completed from covid.. Nose alone problem for me from may 21. Home isolation only. No diabetic. I took methylprednisolone 8mg for 5days twice per day with doctor advise.. On May 20th I inhaled the tomato plants two times. From 21st onwards my nose was very heavy and sometimes paining.. after that I took nosikind 0.1% nosal drops. Took streaming.it was fine. Again from 3 days started problem inn nose. But not like previous. Now it's mild. Some times because of nose block and heaviness I can't do anywork. Very rarely head and teeth mild pain(not continuously). When I take steaming at that time I feel fine. Why it's like that? Is the any issue? Fearing about black fungus. Am I having any sinus problem? If not treated wil it change to black fungus? plz help