If you have a doubt, kind visit an oral & maxillofacial surgeon immediately.  Never delay diagnosis. Nothing to panic but its  better to rule out any problems

Black fungus is rapidly spreading. Symptoms:- 1. Sudden mobility of teeth. (Specially upper teeth) 2. Swelling on face. 3. Sudden Draining of pus inside mouth. 4. Black fungus is rare disease. Nowadays it mostly happens in patients who recovered from covid-19. If you don't have any history of infection due to corona you have less chance to get fungal infection.

Other symptoms for mucormycosis may be: -One-sided facial swelling -Headache -Nasal or sinus congestion -Black lesions that quickly become more severe -Fever

With out examination difficult to tell.