Opk confused?

Hi ladies.

I’m CD16 today,

I’m slightly confused, I’ve been taking OPK 4 times a day, yesterday 8pm I got a very almost positive; Premom scored it as 0.73

After that I was getting fainter lines, until tonight at 9PM; Premom scored it 0.71

When will I ovulate? I got a positive/Peak score on Glow yesterday and it said I ovulated yesterday? Was CD15 my peak?