Question about cycle

Jeongin

I don’t know period and ovulation cycle time exactly well.

I got confused with ovulation cycle.

For example i got period on june 30, emd of period by july 4, it’s 5days. So ovulation should be come on july 13 to 14. But i did check ovulation test on each 2days by july 6, 8,10,12.

6- negative, 8- negative 10-positive 12 -negative. That’s july 10 is positive for ovulation test. It’s called early ovulation? Can someone help about this?