Don't panic, just keep your
sugar levels under control and don't take steroids without doctors prescription also avoid wearing soiled mask again and again wear fresh mask.... If there are symptoms like black nasal discharge, nasal bleed, pain and swelling around the eyes, decrease in vision, decrease in eye movements, anesthesia over face, black spots around eyes and palate...
Next Steps
don't panic just take precautions and monitor for the symptoms above... though chances in your scenario is very less