Hello, I wanted to know why my period stopped after childbirth. After …

Hello, I wanted to know why my period stopped after childbirth. After giving birth, there were some bloody discharge for about a month, then they stopped and then came heavy periods for about 3-4 days, then again after 2-3 weeks, four times in a month. In August, I was prescribed LactiNet and after taking it, my period stopped coming, now I'm worried.