Hi so I recently had sex with my girlfriend. At the time that we were having sex I put the condom on the wrong way and proceeded to have sex that way (it was my first time). Also a day later my girlfriend told me that she had forgotten to take her birth control the day that we had sex so her period was going to be off. About to weeks after this she started ovulating which made me think that she couldn't be pregnant, but even after this she still didn't get her period. Then a few days after she ovulated she took a pregnancy test and it read negative and then about a month or a month and a half later she took another pregnancy test and it also read negative. Does this mean she's not pregnant? If so why hasn't she gotten her period yet?