Mirena
"I am 18, (NO KIDS) currently have Mirena in and it has been in for 5 days now. All I have to say for anyone who is considering having the IUD inserted... choose wisely! First of all, you probably think the same exact thing I did, women are only writing bad things, it won't be as bad as they say. Well i'm here to tell you they are wrong. My obgyn which mind you is also a midwife, FAILED to tell me how very painful my lower back and abdomen similar to back labor, were going to be  for the next FIVE DAYS. Terrible stabbing pain all over, migraines every single day, my right leg is numb all the way down to my knee. Insertion was probably the worst thing I have ever experienced. Needless to say, it's getting removed tomorrow...."