Help please !!!

Mariah • Wife 🌹 Mommy Of 2 soon to be 3

My period was due 3 days ago and I had nothing but brown spotting an a very very light trace of bright blood but that was only for 1 day ... but it hasn’t been enough to fill a pad I just have a panty liner on an it will leave little spots but it’s mainly when I wipe ... does anyone have any idea what this could be I also took a pregnancy test and it was negative