My girlfriend and I had sex on December 23rd, and her period was due the 28th of December. She got her period on time and was for the normal amount of days. She took a
pregnancy test about 2.5 weeks after we had sex and it came back negative. We used a condom but it broke, I still pulled out but a little semen may have gotten inside her as I didn't know it was broken at the time. She was supposed to get her period yesterday and it still hasnt came.
Could she be
pregnant or what are other reasons