Symptom: heartattack in diabetics female

My mother (age: 59 years; having diabetics, thyroid, asthma) got covid positive on 13th May.. Symptoms came on 12th may. 20th May onwards, She had 1) Medrol (16mg bd 3 days, 8mg bd 2 days & 4mg bd 2 days) steroids 2) Debigatran 150mg for 3 weeks CRP values in mg/L were noted as below:- 18may: 36 21may: 14.99 24may: 1.65 28may: 3.75 Post covid NOW, she has observed 3 issues: 1) Half tooth got broken while having food. {this tooth was filled one}. Is that early sign of black fungus? 2) Lower Back Right Side intermittent pain which increases on walking/ position changing. Is that early symptom of heart attack? 3) Currently having Extra sugar control medicine metformin 500 bd before food. When can blood sugar level be expected to reach at normal with only old tablets tribet 2 before bed and amway madhunashini during breakfast? Request to please guide for above 3 queries. Regards Vikram