Pregnancy Test

Hello! I just have a quick question I was hoping the <a href="">Eve</a> community could help shed some light on! My SO had sex on the first day after my period, had an accident, so I took plan b within 48 hours following. I then had what seemed to be a slightly lighter period about a week later (a whole two weeks early basically). Now my period is technically almost 2 weeks late if counting from my standard period, but not late if counting from the plan b induced period. I just took a pregnancy test because I'm kind of in the middle, and it came out negative. Any insight on whether I have waited long enough or not long enough to take the test? Thanks so much!