Levonorgestrel
"Inserted Dec 1 2015. Insertion was extremely painful. My uterus contacted so much that I push out the iud during first insert. My doctor had to do it 2x. Most people say you only experience a minor pinch. For me this was very untrue. This is the worst pain I have ever experienced. I bleed for about a month after insert. About month 2 is when things started to become more "normal". I have experienced what I think are 2 cycles. I was formerly on the pill, had minor symptoms and only 3 days of bleeding. Although I know my body is still adjusting, my periods are now about a week long! I also experience horrible cramping about 5 days before. The cramps are not long lasting rather very sharp and random. I have been having acne face/back. :/"