We are TTC and I've been checking my CM as well as using ovulation strips.  On December 22 I tested positive for ovulation (top strip on the picture below). I tested everyday afterwards and they were all negative. I stopped on the 25th.  Today, the 28th I tested again and you can see on the bottom strip that the test is stronger than the control line. I've never gotten such a strong pink line while testing.  Can I be ovulating so late?   My last period ended on December 14.  Does this make sense?