spotting days after period

leticia • 👼🏽2017. 🌈ttc rainbow baby 2019

so i had what i think was a light period which came 1 day late and only lasted 2 days . the next day it came and was brown spotting then red, next day was light bleeding on and off (didn't fill up one pad that day) the next day just light spotting. ever since i just had light red spotting on and off . what could this be. has been 3 days now .