Okay. Here is a awful story one of my best friends. She called me tonight crying. So....she had been with her boyfriend for a year or so. they ended up breaking up. She had a rebound and slept with another couple weeks after her breakup. After a couple more weeks, she gets back togeather with her ex. Now, she is pregnant. She has assumed its the boyfriends (once ex). Now she called me wondering if its the rebounds. (Yes she feels like a whore). Anyway, she had a period after the rebound guy and even took tests that shows she was negitive for pregnancy. But she is freakin out. Basic question: If you have your period after having sex, can you still be pregnant.