Steroid induced high blood sugar. Steps?

My mother tested positive on 22nd April. Following which, she had been, on doctor's prescription on steroid since 26 April. She consumed Predmet-16 od for 2 days, then Predmet-16 bd for 3 days and then Predmet-8 bd for the next 7 days. From tomorrow, her prescribed dosage is Predmet-4 bd for 7 days. Her post lunch sugar level was 510. She was showing a steady decrease in her before lunch sugar levels from 460 to 272, before today when it again increased to 315. She had been diabetic before, hence she was taking Gluconorm G (0.5) and Istamet (50/500). However, on doctors prescription, since 1 May, she is having Metformin-500 mg odbb. She was also on Duolin 40/140 and Budecort-200 for the last 7 days. Her CPR on the 14th day was 1 mg/dl and she doesn't have any other ailments as of now except fatigue. What should I do now? Should I be worried? I am trying to consult our regular doctor but he is out of office. Do I need to to take any immediate steps?