This is going to be TMI! So Sorry! I just got the Mirena IUD yesterday, and just a few minutes ago I went to use the restroom and a long stringy thing hanging out of my vagina, I pulled it out and I have NO IDEA what it is. My mom said it could just be lining from my uterus, but my doctor didn't day this would happen so I'm kind of confused and freaked out at the same time. It looked nasty, it almost looked like parts of placenta, I have no idea what it was.