text: Yes.  Anytime you have unprotected sex, you run the risk of getting pregnant.  Unless your periods are "textbook" and are regular like clockwork, you can ovulate at any time.  "Textbook" cycles work like this:  The first day of your period is Day 1 of your cycle.  You are most fertile Day 14 thru 21.  So if your period started on, for example the 1st, then you would be on day 11 of your cycle when you had sex.  If you ovulated 3 days early, it would be possible to get pregnant. In all my experience working OB/GYN I would say to NEVER NEVER have unprotected sex unless you want to get pregnant.