birth control
"I had the Mirena coil fitted under general anaesthetic as I was in for another procedure. For weeks after having it I could barely walk, I was in so much pain. The pain eventually dulled to the point I could function but I always thought I could feel it stabbing me. I went to my GP to have it removed, after 3 horrendous years and heard the words everyone dreads when seeing a GP who has been practicing for over 30 years...."well I've never seen this before". 

When my Mirena coil was fitted, instead of both threads going through the hole in my cervix, one of the treads had literally been stabbed through my actual cervix and had to be cut out."