Looking for some advice for those with an irregular cycle who have used OPK's to predict ovulation. I am going to be using OPK's this cycle to help me better pinpoint my ovulation date as well as tracking my BBT. When did you start testing during your cycle since its irregular? Did you start using OPK's based on your average cycle length or did you start using them a short time after your period ended in case of "early" ovulation? I'm never sure when I ovulate and I dont want to miss it, so I'm thinking about starting 5 days after bleeding has stopped. Is this too early or is it better to start early because of my circumstances?

Also, do I need to take two a day? One in the morning and one in the evening for better results?