Confused by 4 day positive ovulation

I’ve been testing this positive and this dark since Thursday night (been testing twice a day since and all this dark). <a href="">Glow app</a> stated ovulation was supposed to start Thursday CD 14 I am now CD 17 and got this picture. What is going on and when did I ovulate?


Above is this AM CD17

Below is Thursday AM and then PM CD 14

Below is Friday AM CD 15

Below is Saturday morning CD 16

Then lastly I will post my opk this AM (Sunday) CD 17

I was negative for 3 days before Thursday AM cycle day 14. Just confused on why I have been positive for 4 days. When did I ovulate?