My girlfriend and I had sex, not a lot really (her first time) and I used a condom with spermicide, and I pulled out before I really came, anyway, her period almost always comes during the last few days of the month...and counting 28 days, she would have started again on the 30th...
Therefore, my girlfriend and I drove ourselves crazy, thinking, oh my God! May be she is pregnant! Since her period is few days late...but today she took a pregnancy test, and followed directions, and she was not pregnant. Her period still is not here! There is no sign of it coming (no grumpiness, no cramps, like usual) (oh, she is almost 19 years old by the way)... What do you think? Can having sex make you have a late period even if you are not pregnant?