What is this?

What CM is this? I’m CD 39, my cycles usually last around 40 days. Got a BFN on CD 37. My cervix is also very high and is generally quite low by this point. I have PCOS and have no idea when I ovulated as LH strips don’t really work for me. Thanks for any help!

Also I had EWCM on the 16th and 17th of March I believe as well as the darkest LH strip on the 15th.