Implantation spotting ?

Hey everyone so I need alittle help . My period is now 2 weeks late and I had signs it would come acne and cramping and I got what I thought was my period . Some light brown spotting when I went to the bathroom. It was kind of brown mucus looking ...
I had that for three days and I  thought it would turn into a full period but now has stopped . I did take a pregnancy test but it came out neg. I don't know if it was too early or if I'm actually late due to something else.
Who had spotting as pregnancy sign ? Or experienced this . Thanks 😘