Thanks for asking at Healthcare Magic. I read your question and I understand your concern. Metformin does not delay or stop menses. As you are near menopause and delay in menses is usual occurance during this premenopausal period as the hormonal level have decrease enough. All that you have to do is to do vaginal ultrasonography and FSH and LH level. Do regular excersize, healthy diet and relaxation excersizes. Hope it helps best. Don t forget to rate this answer and close the discussion at Healthcare Magic. Take your best care. Regards Dr Ejaz