please please help

okay so, me and my boyfriend had sex, i’m on birth control but i missed it the day before we had sex, the condom broke and he came in me, but before we had sex i doubled up, we noticed the condom broke and i took a plan b within 20 minutes, i continued taking my birth control in the following 2 weeks, and now have finished the pack, and have been off of it for 3 days, but my period hasn’t started today yet, am i pregnant ?