Pregnant or plan b?

Hey y’all so my bf and I were having protected sex (condom) on May 30 but we noticed the condom had ripped only after we finished so of course I took a plan b on June 2. According to this app I last ovulated on May 26 and my period was supposed to come on June 9th but it still hasn’t. Could this be that the plan b didn’t work or that it pushed my period back?