OK everyone I am so confused. I had a very regular AF until I mc at 9w last sept. Then for a few months I was right on schedule. This month I am 9days late last month I was 21days late the month before that I was 10 days late. I have been TTC since December. Have been taking glucophage (metformin) for about 2months. I have taken tests and get bfn. What can I do to help regulate?