Pregnant?

I am 7 days late for my period. The last time we did it, was on my last day of my period. He didn’t finish whatsoever because we were scared, we did it unprotected. I also just started taking doxycycline hyclate, it’s an antibiotic but I’m not sure if it does anything too.

My period has been late every so often too, I even missed my September 2020 period. Maybe this is just a pregnancy scare?