I have had unprotected sex Thursday, Friday, Saturday and my period came on Sunday. Should I be worried if I am pregnant or not

Having your period is a sure sign that you are not pregnant. You do know that a period is the way your body basically cleans everything out? If you were pregnant the egg would've been fertilized- I don't want to get into details I mean, this is like, elementary stuff.

I do understand that.. but also understand that women have periods all the time when pregnant... I was asking because my egg could have been fertilized on Thursday, who knows. My mother was pregnant with me and still had her period until she was four months