One PCOD patient conceived with difficulty and now she is very anxious. She is having 21 weeks gestation with mild polyhydramnios, 30 mm cervical length, internal os dilating up to the 4 mm, left uterine artery PI is raised, HbA1c is 6.1.

She is taking Duphaston, cap sustain 200, metformin 500 mg. What should be the next line of treatment, focused on cervix and HbA1c?