😩 Chemical pregnancy advice whilst on Clomid

On Christmas eve (AF due on xmas eve) I got a positive hpt 4 different brands later all positive

Lines were slowly getting darker on the 28th I started bleeding and haven’t stopped

My question is when should I ovulate (I do normally take Clomid) but can’t take it now as this isn’t AF - so if I was to ovulate on my own when should I start taking opks?

Has anyone experienced anything like this??

Any help or advice welcome

Thank you x