Does anyone else ovulate before glows predication or on the day predicted ?

Question

I've been doing OPK this month and I've been doing it since CD 5 and it's now CD 11 and tomorrow is my predicted ovulation start day . But all my tests have been negative and supposedly it predicts ovulation up to 2 days before ovulation starts . Is it possible to not ovulate at all ? No right cause then I would skip a period ?

Answer

Also, it is possible to ovulate and not catch a positive opk. Some women's LH surge is so short, they have a hard time catching it on an opk. There are 3 ways to know for SURE you are ovulating. Blood tests in the last part of your cycle to measure progesterone, a well times ultrasound, or daily tracking of your basal body temp.

Answer

Sometimes I ovulate when glow says I will. Sometimes I ovulate early. And sometimes I ovulate late. Our bodies aren't machines. My cycles are never less then 26 days and never more then 29 so I'm very regular yet that still leaves room for error when an app is simply guessing when I'll be fertile based off averages and my past cycles. 
Also, yes it's possible to have a bleed and yet not ovulate. It's called a break trough bleed. It's the same kind of "period" you get on the pill because you don't ovulate on the pill either. Some women won't get a period if for some reason they don't ovulate. Others will get a breakthrough bleed that is exactly like a normal period. Depends on the person

Does anyone else ovulate before glows predication or on the day predicted ?

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