I have PCOS and have to take metformin to help me have a period. The first 2 months, I had a period on the 11th, exactly. Last month, my period went a little haywire and showed up 5 days late on the 16th. I had one very faint preg test at the doc, but my blood test was negative so I think I had a very early chemical pregnancy. My tracker is all messed up now and I'm not sure when I should test. Should I just wait? Test the 11th or the 16th? Any help is appreciated.