I am very cautious when it comes to having sex. My boyfriend and I are constantly washing our hands and making sure not to have any genital contact without protection. I am on birth control and he wears condoms. He always pulls out when he ejaculates and we make sure to clean up very thoroughly. Pregnancy is not an option for me. I'v had late periods before, my body is not exactly on a schedule, which has always been normal for me. I haven't had intercourse with my boyfriend in over a month now, but even at that, our sex is very well protected as i have said. I haven't had my period in over a month. However, correlating to the stress and exercise, the stress may branch from the last few weeks of school regarding finals, and the exercise comes from taking gym class over the summer. These two things may have something to do with my late period. I'm kind of worried.