[ Women's Health ] Open Question : Pregnancy? period help? really worried!?

[ Women's Health ] Open Question : Pregnancy? period help? really worried!?

So im about to start my senior year in a week and my life is just getting
extremely hectic, i might be getting a job and im turning 18 next month
and a lot is going on right now and is going to happen this year. Im
honestly excited about it but i cant seem to relax. My boyfriend and i had
unprotected on the last day of my period in the end of july. I took the
plan b pill. My last normal period started on july 24th. But ten days
later i bleed again for three days, could that have been my period? Now my
periods late and im really worried and i dont know what to do. Please help
me. Its my fault cause we kept on having unprotected sex anyways. He didnt
ejaculate inside of me the other times. I really need to go on
birthcontrol but first i need to know if im pregnant or not or if im just
being paraniod. Is.the plan b just screwing up everything??