Could this be pregnancy?? Quick description below

My boyfriend and i had sex, and he came a lot inside me and i started my period literally right after when i went to the bathroom. Like he fucked my period on basically. Well, my period lasted 3 days tops of light-medium bleeding and it was over, which is very weird and unusual. Usually im bleeding and spotting for 8 days and its heavy the first half. and its been like that the past 3 years. Could this be pregnancy?? We also had sex the entire week prior when i was ovulating and he came in me one of those days