So I have PCOS and have irregular periods. I have been on metformin and then switched to pioglitazone since my body couldn't handle the metformin. Anywho, my last period started on the 27th of August and my next period isn't expected until the end of October (my cycles are anywhere from 50-80 days). Well today I had a small amount of discharge that was brown in color. Any ideas if this is implantation bleeding or if AF is starting super early?