well only a pregnancy test and a doctor can tell you if you are pregnant or not, we can't just assume you are...Go get a test, if you have not had a period since march, and it is not april..when should you expect your period? If its late, get a test.
Is there a posibility, you obviously had unprotected sex, because you are trying for a baby, so yeah there is a posibility, but a test would tell you if you pregnant. You can test 4 days before your expected period.