Light bleeding

Maria

I had my baby 2 months & 7 days ago i haven’t had any-type of a “heavy period” i was spotting on the 27 and then again 28 completely went away on today ... But I’m curious because when I’m on my 3rd or 4th day of my period is super heavy i don’t know what’s going on also I’m not in any type of birth control i have been fornicating , but also don’t know if it’s because i breastfeed? i just know this didn’t happen with my first..