Apologies for this topic, suspect it's been done to death but please can someone who has a better understanding of dates advise me as I am driving myself mental? Regular 28 day cycle. Ovulated between 19th and 22nd this month (see, I'm useless!). AF due 6th. Today I have a dragging feeling down below and dark brown spotting. Am I grasping at straws this could be an implantation bleed? I can't believe I have just been looking at google images of other women's vaginal discharge, what have I become? 