What Causes Heavy Periods With Clots And Abdominal Pain After Mirena Insertion?

i have had a mirena for almost two years and i have had abdominal pains since having it put in but lately its been worse and i have real sharp pinching pains it feels like my mirena has moved and my periods are very heavy and have alot of blood clots tht are big and i have very bad cronic head aches since having it inserted wat should i do