yes any time that you have unprotected sex there is a possibility of a pregnancy of course there are only a few days per month that ovulation occurs and contraception is most likely. just before your period is not one of them but just in case. you should do a few pregnancy tests in a few weeks if you have not had a normal period. being only four days late is much too soon to worry about it.
i had unprotected sex the day i was supposed to start my period now i'm 4 days late. could i be pregnant? . my husband and i had unprotected sex and during it i started what we thought was my period and respectively so it was on time. so he ejaculated inside of me. once in the light we realized it was just a brownish discharge not exactly my period and that was it. i didn't discharge again and i also never started my period. now i'm 4 ish days late. could i be pregnant?