Late Period - Negative Pregnancy Tests

Hi everyone!

Question for you...my period is late about 5-8 days. This has never happened to me in the nearly 20 years I’ve had my period. I’ve taken several tests and all have been negative. Unfortunately, I did not take any ovulation predictor tests this month because my husband and I were taking a break from TTC because we were traveling this month.

I stopped birth control in February of this year and my period and ovulation has been consistent (note we didn’t start trying until June this year).

Has anyone else had this? Did it end up being a pregnancy? At what point should I become concerned and talk to my dr?

Thanks!