Hello friends, my first 3 periods after baby delivery was very heavy and lasted for 7 or 8 days... my 4th period wqs normal flow which lasted for 5 days ( usually i have 5 days before pregnancy too). Now my 5th period is again heavy... what could be the reason. Is this normal?

If it's profuse please inform your doctor. It could be hormonal imbalance.. until you breastfeed there will be fluctuation in hormones.