Im on progestin birth control, started my period 1/10&1/11 i took the pill 6 hrs late and had sex but took a plan b the same day & my period continued until 1/13 - im wondering what my chances of pregnancy are?

Very tiny chance: Plan B can be taken on any day of a woman's cycle, so that a woman does not have to think about which day of her cycle it is. Plan B works most of the time, but not all of the time. One should do a home urine pregnancy test 3 weeks after sex. Also, use reliable forms of birth control so that Plan B will rarely be needed (hopefully never again) in the future.