On sep23 i had sex and my bf pulled out. i also took plan b 4 days after sex. my period came on time for two days. chances of being pregnant ?

It happens sometimes: Plan B can alter the menstrual bleeding for the cycle in which Plan B was taken, and sometimes the next cycle too. There can be irregular spotting. One should be sure to check a home pregnancy test about 3 weeks after sex, because Plan B works most of the time, but not all the time. Plan B works less effectively if taken more than 2 days after sex.