what are the chances pls help

V

Could I be possibly pregnant? Had an unprotected intercourse 13 weeks ago / (3months ago) just by SINGLE THRUST ! I know that is funny and weird but yeah it’s JUST A SINGLE THRUST and I’m delayed for 4months and I got 4 negative test w (FMU) I don’t know what to do is there even a chance

Im freaking out please help