What does this mean?

Sarah

This is my first month using ovulation tests. I’ve been taking them everyday since CD 7. I’m on CD15 now.

I wasn’t aware that you should take them every day around the same time so they have been kind of scattered. However I got into routine around CD 12 and started taking them around 9:30pm each night.

Anyway, my question is my test lines have been lighter than the control line which I know is negative. Then on CD 13 it got darker but not as dark as the control line. CD 14 comes around and it’s lighter than CD13’s test. Does that mean I ovulated on CD13? Or am I still waiting?