Can someone please explain this to me?

I’m new to opks. Yesterday I had a positive, and now today I have another positive. Does that mean I did not ovulate yet or that I am now? I thought that when you get a positive, that means you will ovulate the next day. Do you get strong positives all the way through until ovulation is over? I’m just super confused by this process!

*Pictures below*

Yesterday’s test

Today’s test