How many days do the first periods last after childbirth? In general, …

How many days do the first periods last after childbirth? In general, a month passed with discharge and ended, but after 5 days, menstruation came back. They're quite abundant and have been going for 7 days already? I am breastfeeding, it has been over a year since my first birth, and here they come immediately and for a long time...