My girlfriend and I had used the morning after pill after a condom had broken. Everything seemed fine after. We recently had unprotected sex about a week and a half ago. Where I had pulled out before ejaculating. Her period had seemingly been late and very light from what she had told me. She has some minor symptoms of early pregnancy. The light period had made me wonder if it was implantation bleeding or a side effect after the big hormonal change after taking the morning after pill prior. We just took a pregnancy test and it came back negative. How should I proceed? Should I trust the test?