Hi all, need some kind of insight here, I had a period from 27th June to 2nd July, after that I used the ovulation strip tests (NHS equivalent) eveyday at 4pm, I got very faint lines until 18th July which showed two strong lines, I used a clear blue ovulation test and showed a solid smiley face, husband and I DTD week leading up to ovulation and on ovulation day. Over the past 8 days I've done ovulation tests and I've got two solid lines but the clearblue rests show negative?? Why would the strip tests show a strong positive and digital tests show negative? Haven't done a pregnancy test yet.