Frustrated

Yuliana
Hello ladies,
​I'm 13 DPO, I just had a pregnancy test right now, test came back negative. I had what I thought was implantation bleeding yesterday (drop of pinkish blood) lower level feel weird, light cramps, I feel nauseated a little and I have a strong sense of smell . I'm not sure if is mental or what by I should be pregnant but the test came back negative and I'm frustrated now. I had my period on 03/01-03/05 had sex on my fertile days... Do you guys have any idea why is not showing positive yet? Please HELP...!