Should I take plan b?

Marley

Okay so I’m on the pill and I just started my “period week” of placebo pills yesterday. I usually don’t get my period until the end of the week. I take my pills everyday but sometimes at different times. Last night my boyfriend didn’t pull out. Would I still get my period at the end of the week as normal if I didn’t get pregnant last night? Also should I take a plan B? Please help !