Hi I have been using clear blue advanced ovulation tests for the past 3 months. Last month I started testing from day 14 and got a flashing face everyday until I got my period. No static faces. I then thought I'd missed it so I started testing this month from day 8 I got the 0 until day 13 I got a flashing face and had pains in my right side. Ofcourse I ran out of sticks and have been using the plain dip ones with the 2 lines. I still havnt had 2 dark lines and it's day 18. I downloaded the ovia app which told me my best ovulation day was yesterday day 17 but I'm still not getting a positive reading on the ovulation sticks. I also have only ever noticed ovulation pain on my right side. Has anyone else ever had any of these problems?