Pregnant? Super late period?

I’m not on regular birth control because of my parents so my fiancé and I rely on Plan B when there’s an accident. We’ve had a really rough couple of weeks and I’ve taken two or three of them within three weeks (I’ve lost track at this point). After one of them, I bled for a few days but I haven’t bled since. My period is officially three days late and I’ve had really bad cramps in my lower right side. Should I go ahead and try a pregnancy test or wait a few more days? Plus I be pregnant?