Pregnancy or Plan B delay?

So About 1 month ago I had sex eith my boyfriend. We used protection but just in case I took Plan B. The next day we did again, protected but since I get really anxious I took another pill. 2 days later we had sex again protected but the condom seem to slip up a little but It was 4 days before ovulating. A couple of days later I had spotting, blood clots, and heavy cramping. Now , its june 12, 2018 and my period is late by 3 days. Do you think that’s because I took Plan B two consecutive days or because I’m pregnant?