Help my period is 8 days late

Hi guys so i had sex oct 28th and the condom broke but my bf didn’t come. It was the last day of my period and i wasn’t ovulating. i took a plan b within minutes of it breaking. i was supposed to get my period 8 days ago (nov 19th) but it hasn’t shown up. I took two pregnancy tests and they both came out negative. im really scared and idk what to do someone help😭😭.