Help!

So i have been taking ovulation tests and July 22 was my ovulation day. And for the past 3 days its showed a blank circle (not ovulating) but this morning it shoed a flashing smile which in the directions means im starting to Ovulate.... im going to retest later, but my period has been non existent since March so i was hoping tracking my ovulation would help me, but now its only giving me 3-4 days with no ovulation... that cant be right...

also i was reading some posts that say some women used an ovulation test cause they didnt have a pregnancy test and it showed them ovulating then after a few days they tested with a pregnancy test it came up positive.

I am still 4-5 days away from technically checking, and 10 days till mu supposed late period....

Any thoughts???