😫CD 39! And 15 DPO - negative tests?! HELP!

Right I’m going out my mind here..

I’m on cycle day 39.. and I think I missed my peak ovulation this month using my opks but from looking at the tests each day it looks like it was around cycle day 23/24 which is normal for me.. I’m still getting very negative test strips (easy@home) and no AF..

Can someone tell me what is going on? There surely is no possibility I’m pregnant but why is my cycle so long this month and why no AF ?!

Any comments would be appreciated!!