Hi, I'm a 28 yr old mother of four children, the youngest just turning one, ever since I gave birth to my last one, everytime I get a period, I have severe pain that feels like afterbirth pain. I have anemia caused by prolonged (12+ years)heavy periods, but haven't had this pain before, I've had 3 vaginal u/s ruling out any underlying problems in the uterus. The pain is worst whilst standing after sitting, and when going to sit, any information or advice would be greatly appreciated.