You can get pregnant really any time you have unprotected sex . . . the range of ovulation can be any where from 10 days to 18 days from the day you start your period . . . some people ovulated multiple times in one month. . . . if you knew you were ovulating . . or had about to ovulate . . there is a very high chance you could be pregnant. . . but I would wait a few weeks before you take a test . . .