Levonorgestrel
"I had skyla inserted in April 2016 and after a couple months of my body adjusting it was great! But, last month while having sex with my boyfriend I felt extreme pain in my uterus so we stopped. After a couple of excruciating hours trying to decide if it was skylas fault it hurt, I decided to go to the ER. The pain was so bad I couldn't even walk straight. After the ER doctor removed my IUD I was instantly relieved. I'd never felt so relieved in my life. According to the ER doctor my IUD had rotated slightly during intercourse and that's what caused the extreme pain. He also said that more often than not women came in to have it removed from it moving around in their uterus. I won't ever get another IUD"