Ovulating close to period?!

I have endometriosis which does affect my period cycle however for the past 3 months my period has been quite regular.

My husband and I are TTC and I've been taking note of CM and testing using opk twice a day (early afternoon and evening) as recommended.

My period is due in 1 week and I still don't seem to have ovulated?!

Is this the same for anyone else?

Thanks for reading and in advance for the advice!

Baby dust to all xx