I Am 32 Yrs Old.having One Baby Of 9 Months

I am 32 yrs old.having one baby of 9 months old.my menstruation start after 5 month after baby birth.there was pregnancy.I was taken medicine from medical and discard it.(pregnancy of 40 days).that time bleeding was heavy.after that two time Mc was come but menstruation was very low and not for a single day.I am threatening that there is if any problem