Let me first say my Dr put me on metformin at the end of Oct because she says I have pcos since I have a high level of testosterone. My periods have always been like clock work on the 28th day. This last one started on the 29th day. It seemed normal for the most part. When I thought it was over I noticed more of a brown color of blood, just for one day. Then one day after that I noticed very light pink blood when I wipe. Is this normal? should I call my primary care Dr that gave me the pills or a obgyn?