birth control
"I had Mirena inserted in June 2015. The insertion  process was very painful. I had a local anesthetic, and the doctor said it reduced the pain 50%. The pain of the sound for uterine measuring was significant despite the anesthetic. I experienced some bleeding and severe cramps with rectal pain and pressure for 9 days.  I spent most of the 9 days heavily medicated and missing work. I could not sit down without extreme pain. This is NOT a normal reaction, so I should have removed it right away. After ultrasound the IUD appeared to be properly placed. The conclusion was that Mirena was either poking or aggravating a major nerve. Had Mirena removed after 9 days. Symptoms improved immediately upon removal but not completely resolved yet."