I have a question. I have been on paragard since august 2011 after i had my son in june 2011 and every once in a while i will have periods where i bleed for an hour a day for two days then the 3rd day i start very heavily with a large blood clot. I dont know if it a miscarriage or not. But i usually have really bad cramping and my lower back hurts and i get bad headaches. The day i hae the clots is the only time i get them at all then i bleed heavily for 2 days then by the 5th day im off of my period. And this doesnt happen every time im on it. So my question is, is it a miscarriage that im having when this happens?