Why Am I Bleeding Heavily On 5th And 6th Day Of Menses?

hi

i am married woman age 27years. i am having marriage life from last 3.5 years and have a 2 years baby. from last month during my mesuration cycle, on the 1st day there was very little bleeding(approx 1 time only) and after that for next 2-3 days there is almost no bleeding after that for next 5-6 days it starts heavy bleeding need to change my pads 3-4 times.



Please suggest is there any hormonal problem as i am overweighted.