postpartum bleeding help

Im 5 weeks post baby and i had bleeding like normal after delivery. Then it stopped around 3 weeks post baby. Now at 5 weeks im spotting again. Another detail i should add is im nursing strictly and i also had intercourse a few days ago i also noticed what resembled shedding of uterus lining. Thoughts is ny period returning already bc with my first baby i didnt get it until she was 8 months old