3rd postpartum period and spotting

Katie • My name is Kate and I just gave birth to our beautiful daughter February 17th 2016. She is our world and we couldn`t feel anymore blessed❤ I am currently pregnant with our July 2018 baby!
So I just finished my 3rd postpartum period on Sunday and now 4 days later I'm lightly spotting? This was the first period that was pretty normal but, now I'm confused if I may be getting another one or if it will just continue to spot. Is this normal?