Hello, after childbirth exactly one year later came menstruation, for …

Hello, after childbirth exactly one year later came menstruation, for two months in the same days came, the third month with delay. And now in January some kind of cycle disruption, pink discharge was first, earlier numbers, and only one day, then after 15 days brown discharge, I thought that already definitely menstruation and again only one day. Has anyone had this? There is a spiral.