Me and my boyfriend have been having unprotected sex since 08/25/14and in the past four months i have not had a normal period could i be pregnant??

Of course!: One of the main reasons people have unprotected sex is to start a family or add another child to a family. If one does not want to have children, use a good form of contraception (there are many available). A urine pregnancy test can easily tell if a woman is pregnant. The tests are sold everywhere, and are cheap to buy. The result will be positive about 2-3 weeks after conception.