For 2 months I have been tracking O with OPK this month started using clear blue digi for the past month. I started testing CD 7 which was low I got flashing smiley cd 8 I'm now CD 18 and still flashing I had some back pain this after noon went to bathroom with really metallic smelling urine/brownish pink streaked discharge took another test still flashing could I have ovulated already and only had small amount of hormones and not registered as a surge??