Has anyone ever had OPK tests start progressively get darker a week or so before AF and end up getting a BFP? I am currently 8 days before AF is supposed to be due. I thought maybe I missed my ovulation this cycle or possibly didn't ovulate at all this cycle but I kept testing anyway just in case. I am now 8 days before AF and my OPK tests are darker each day? Anyone have this experience and it turn into a BFP?