I have been using Clear Blue dual hormone oils for about 5 months yet and they have always given me a leak reading on either day 15 or day 16 of my cycle. Started testing on Day 14 and got low cicles on Day 14 and day 15 and then high fertility for the last 3 days. I’m now on Day 18 and all other signs of ovulation have gone. Could I have started testing too late and missed ovulation? Thanks