I had unprotected sex today i am planning to take the plan b incase if there was any precum just to be sure because he pulled out before he cum and since my period comes tomorrow do you guys know how many days the planb will delay it ?

Hard to guess: Plan B (or other similar emergency contraceptive pills) can alter the menstrual period bleeding for the cycle in which Plan B was taken, and sometimes the next cycle too. 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 should rarely be needed in life, perhaps just once or twice in a lifetime.