Help! I've been using Clearblue digital ovulation tests... A few days ago I went through what felt like ovulation (also right on time), but the test never showed as positive! My CM was watery, libido was higher, and BBT was right. I know we're not meant to look at the lines - but the second line got continually darker and darker. But no smiley face!! Now the second line has disappeared again! Has anybody here ovulated, but it hasn't been picked up by a test?