How can you be sure you didn't ovulate? Are you using any other things to help determine this. May this month is unlike the others. Eh, maybe it's just because I'm not a big believer in tracking these things with cervical position. Maybe it's just mine that is unreliable, but I don't know, I've seen many other posts where CP looks to have some questionable reliability in some instances, even for women who use CP regularly to track.