I agree what an ignorant doctor. Hormones can definetly mess up your blood sugars. It was the same for me. Just a different timing, for me the week after my period was tricky. My insulin resistance was very high and i needed almost double the insulin and the week of my period I was very sensitive to insulin and needed to be careful to avoid hypos. What helped me was my gyno, she is great and was the first person to show an interest in this problem and she came up with a possible solution. The right solution for me was to take birth control continiously with a break every 6 month.