"i&#039;ve had nexplanon for a little over a year now and i have not stopped bleeding since. i&#039;m not having full periods but i&#039;m constantly spotting throughout the day. i guess you can say it&#039;s a effective birth control due to the bleeding everyday i can&#039;t have sex. the implant does sometime cause pain at the insertion area and lower back pain. i sometimes experience horrible migraines and i&#039;m constantly tired and extremely moody. "