I have travelled by a car to another country last week and was supposed to get my period on the 21st january, i didnt get it and on the 22nd i had unprotected sex with my boyfriend since then i’m 8 days late to my period which has never happened in my life and I travel often by a car to another country. I then took a flight back home on the 23rd of january so can travelling be the cause of my very late period ? Im so lost because my boyfriend is soo convinced that i have cheated which is not true im just to frustrated from everything can anyone give some explanations as I dont want to test just yet.