on sept 16 I was on the second to last day of my period, and I had booty sex. I did not know he ejaculated in my butt so I didn't find out until I went to the bathroom. probably 3-5 minutes after this happened. I got and took plan b one step as soon as I could which was September 19. I began bleeding on the 24, a normal heavy 5 day period. i am now about 3-4 days late for my period this month. I have not not any signs of being pregnant what so ever. I'm just nervous that i still may be even after many people have told me I am not. someone help !