Had unprotected sex on my ovulation day and took plan b 31 hrs after the fact, my boyfriend says he did not come inside .now im 3days late am i preg?

Home test: A pregnancy test, even a reliable home test, is the only way to answer this.

HPT: Take a home pregnancy test to know one way or another. Emergency contraception symptoms can include spotting or bleeding, changes in menstrual flow or your period may be late or early. Take a home pregnancy test & notify your GYN if your period is 7 or > days late.