Hello.bbt shows ovulation at cd12, temp much higher since.opk positive cd13.on cd12 opks were darker than usual,still negative.which should i trust?tx

Regularity of cycle: OPK detects LH surge which occurs in several circumstances like periovulation. Temperature rises when progesterone rise. Both occur around ovulation. The best test for ovulation is cycle regularity. Most women with regular cycles ovulate 14 days prior to their menstrual period. This is a retrospective diagnosis. If a women is regular 28 days ovulation occurs day 14, if 30 days regular then day 16.