My boyfriend pulled out but then went right back in, this happened on Sunday and I was supposed to get my period the next day but I didn't. I waited to see if I would get it later because maybe it was just a delayed period but it didn't come. On the third day (72 hours after) I took the Plan B pill just to be safe. I started getting a very small amount of brown discharge but I can't tell if it's the side effect from the pill or what !!! It's now been 4 days that I was supposed to get my period and 3 days that I took the pill.