Any moms experience this?

Hello, i had a baby in december. I havent had my period becasue i breast feed. Around may i bled for like a day or too it was super light, then happened again in just. After that i got a period on August 10th and it still hasnt gone off til this day still a heavy flow. It was a few days in the beginning where it would seem like it was going off. But i still have it, is it normal or should i visit my doctor? Im not on any birth control.