birth control
"I'm 22, have never been pregnant, and had my Mirena inserted ~3 weeks ago. Other than some slight cramping during and some moderately worse cramping later that day and for a few days after (nothing pain killers can't handle) it's been great!  I used to have really heavy, really painful periods (which is why I went with Mirena over the paraguard) and though I was supposed to get my period the week after they put it in I haven't had anything but super light, almost non-existent spotting."