Levonorgestrel
"Got my IUD last week. Insertion took about 4 minutes total. It felt like an extended pap smear with a few uncomfortable pinches and mild cramps. I had mild cramping for the next several days and no spotting. I found it uncomfortable to sit up for first 2 days so I was glad that I took the day off work to rest. probably the worst side effect has been the fatigue and feeling a bit more emotional than usual. I'm hoping that will lessen once I get used the hormones. One word of advice: Since you don't know how your body will react I think it's good to take the day off afterwards. If nothing else, it's good to pamper yourself for making a smart decision for your sexual health. Overall, this has been a positive experience."