L.K.
I highly recommend the book "Taking Charge of Your Fertility." If you have PCOS (as do I), then your cycles can be very long (mine average around 50 days). If you ovulate at all (I haven't in about a year), it can very late. Your ovulation isn't based on dates, but on hormone (LH) surges. Rely on your temping (as well as cervical fluid and position) to correctly predict and record ovulation. It's very frustrating, but you're already off to a great start with temping! Best of luck!