IUD inserted. hi, i have an IUD inserted about 2 and a half weeks ago, and since?

hi, i have an IUD inserted about 2 and a half weeks ago, and since then i haven't stop bleeding. went to the ER 2 nights ago, and the DR told me the IUD have moved to my left side (that's where i have the pain). i know this sounds gross, but the blood is coming out pretty heavy, and a lot of blood clots. couldn't even go to work yesterday, was talking to my manager, and she told me about suing them. i need help. can i do that???