Levonorgestrel
"It took my gynecologist nearly forty minutes to place the liletta. I am 21, no kids, and I have a narrower than average cervical opening. I think this is why it took so long for him to place it and why it was so painful for me. It was literally the worst pain I've ever experienced. I was in tears the entire time. Today is only the second day I've had it, and the light bleeding I had has been reduced to very slight brown spotting. The cramps are making it hard for me to want to keep the IUD though. Pre-IUD, on the first day of my period I'd get cramps so horrible I'd be nauseous and couldn't eat anything. Well, immediately after IUD insertion I started having similar severe cramps that have yet to go away and nothing has given me relief."