Plan B

My fiancé and I had unprotected sex on October 30th My period went of on October 26. Took a plan B pill October 31st. Today is November 7th and I am bleeding, but I'm not having no cramps, not moody, breast not sore (signs of my period) so am I on my period though??!! Is this normal?? Has this happen to anyone before?? Am I pregnant?? What should we do??

SOMEONE ANSWER ME PLEASE