Opk line confusion

I started my opks on CD 10. The test line color was starting to get even with the control line but it wasn't quite there yet. Yesterday the test line was fading away and today it's barely visible. Does this happen to anyone? Has my ovulation past? According to glow and other prediction websites most fertile days were between 16-18th of May. On the 16th it was the closest color to the control line so maybe I ovulated that day 🤔