My girl friends last period was May 18 and since then she hasn't got her period. We had sex about a week after her period but it was with a condom and we had unprotected sex for only a minute or so BC we wanted to mess around and see how that was. I'm worried pre *** got her pregnant as she has been experiencing a lot of symptoms of pregnancy but it could be for diff reasons. Last week she took a pregnancy test which read negative but I'm still not certain bc it was before her missed period and idk I'm just very paranoid. She bled a little last week out of mo where if that detail is needed. Please help