Levonorgestrel
"1.5 months along with Skyla. Had a pretty bad insertion experience due to my "unexercised cervix" I tried mirena and it would not fit. After 15 min of agony went with Skyla and it was still a little difficult but finally got it in. I was having uterine spasms and could always feel the IUD inside me for about 3 weeks after insertion. I found out ibuprofen was to blame. Since I stopped taking ibuprofen the pain has subsided to right before period cramps and sometimes when I'm aroused or after having an orgasm. Another downside was the initial bleeding for 2 weeks straight. Then I had one week of spotting, followed by one "spot free" week and back to a full blown 7 day period. Besides the daily spotting and spotting after sex skyla is ok."