Still Bleeding

Tishara

So what I thought was My first period After having my son July 23 started September 10.it started off light but usually my period last for five days and it has now been eight days and I’m still bleeding it stopped for the whole day on the fourth day and then it came back the next day. I don’t breast-feed I did pump for like three weeks but other than that I don’t understand why I still have my period or why im still bleeding.. has this happened to anyone else?