I have never missed my period in a decade and I’m always on time. July 28th I had unprotected sex. Took a plan b on the 4th day. I had my period for August and September, but October is no where to be found. I’m now officially 8 days late. I’ve taken a pregnancy test in August, September, and 2 yesterday. All of them are negative. I have absolutely no signs of my period coming. Should I be concerned? Or am I just paranoid?

No harsh comments. I’m already stressed about not having my period. Thank you In advance.