Ovulated?

Marie

My ovulation tests only got delivered on the 23rd so I started testing that afternoon. My cycles can be anything from 25days to about 37days, but average at about 31days. My last period started on the 10th of January.

First test in the photo was taken on the 23rd. I did one a day, except today where I've done two. The lines are just getting fainter and fainter, have I already ovulated just before my tests arrived?