Hi! I Had Unprotected Sex From Jan 31-feb5 But My

Hi! I had unprotected sex from jan 31-feb5 but my period came 5 days later, i also used emergency contraception btw. My bf lives abroad so after that ( jan 31-feb5) we havent had sex. I had my period on may 7 but it was more painful than my previous periods. Am i pregnant or is there a chance for pregnancy in my case?