please answer!! two days late!

okay so i had unprotected and protected sex september 4th but my bf did not cum inside of me. i was supposed to get my period on the 21st but have not gotten it. i have been feeling some cramps and have been getting headaches, normal symptoms i get before getting my period so it feels like my period is coming but it has not come. im stressing so hard because i want my period to come so could that be delaying it??what do y’all think???