hi everyone, i read in another forum on steadyhealth that plan b only works for some people. i'm really scared now b/c the condom rolled up a bit the last time my bf & i had sex & i took plan b about 15 hrs afterwards just in case.

how do i know if i'm one of the people that plan b works for? what if i'm not? what do i do if the condom breaks or something like that? is waiting to see if i'm pregnant the only option i'll have left?