please read..

I had anal today with my boyfriend and I am on my fourth day of my period. My fertile window starts exactly a week from today and my actual ovulation day isn't arriving until around 11-13 days. My boyfriend ejaculated and it kind of went into my butt crack and I'm afraid some might have got into my vagina or around my vulva. I had a tampon in and right away I changed it afterwards and cleaned up.