Plan b help

I had sex the 26th, which was 2 days before I was supposed to get my period according to period apps (28). The condom broke but he didn’t cum inside me yet just to be safe I took plan B within 12 hours. Yet, I was supposed to get my period on the 28, and it’s currently the 30th so it’s 2 days late, should I be worried about being pregnant???

Idk if this is relevant but I had white discharge up until yesterday and now I don’t ( maybe that means my period will start soon?? Idk!!!)