OPK help please!

Hi i’m new to tracking with opks. I have pcos and haven’t gotten a natural period in a long time.. I finally got one this week naturally and was so excited!! It’s winding down now (only see some blood when I wipe sorry tmi) so I thought I’d start doing the opks to watch the line appear and then darken as time goes on. I took the one below and got a pic of it right at 3 minutes and it looked like this. Could I possibly already be starting to get close to ovulation dates? Or does this just happen once your period starts to end as LH gets in your system?

I did take one a few days ago and it was clearly negative so I don’t think this would be an indent or anything! Just not aure how these work just yet, any advice is helpful:)