Unlikely but possibl: Hi! If you mean you had sex 4 days after your period STARTED (and it was a normal period), then chances of pregnancy are practically nil because need at least 7 days from start of cycle for ovulation to occur. If, however you had sex 4 days after period FINISHED, then it IS possible to get pregnant if you bled for >5days and your cycles are 21-25 days long.
Answered 1/16/2016
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