pain and bleeding

Nancy
Okay so I am 6 week pp and I have been bleeding on and off again since I had my little girl. I bled for about 2 weeks straight and then stopped for a week. Then it picked back up for a week and stopped again, now I'm bleeding again except this time I'm cramping real bad and sometimes I feel like someone is grabbing my insides and trying to rip them out. I'm not sure if this is normal or not so I was wondering if anyone had the same thing happen to them? If so was it normal? Is this supposed to be my body trying to regulate or is something wrong? Help please! And thank you.