Levonorgestrel
"I've had 3 x Mirena's now. Love them. First 2 were great, no pain to get done, bled on/off for a couple of months then no bleeding for 5 years, no mood swings, perfect. I had one put in last October and was in excruciating pain that night. Doubled up in bed almost vomiting from pain. I have a high pain tolerance. It has settled down but have only had only a couple of days break here and there from bleeding. I never went back to my Gyno for my post check up which I should have done. I went to see my sisters Gyno last week and told him how I'd been having trouble so he checked and can't find iud. Going in for surgery Friday to get it removed and a new one done. Wouldn't be without one now. Advice - if not working how it should get it checked."