Ok so I started my period last month. First one off birth control. So this month i started using opks answer brand.I started using them on cycle day 10. I got a positive on cycle day 11 in the morning. Later on that evening it was negative again. So I kept using them since I had left overs. I have taken one a day since then. Now the faint neg. line gets darker and darker each day. Could the begenning of a pregnancy cause that? Or something else cause it??? I know I ovulated. Had ewcm until day 14 of my cycle.I believe I oualted on day 13 of cycle. Anyone have any ideas??? Thanx!!! Baby dust to all ttc!!! :):)