"i got my nexplanon inserted about 8 weeks ago when i was 7 weeks postpartum. in the first 3 weeks or so i developed extremely greasy hair and horrible mood swings. i had my first pp period a week and a half after insertion and it was a bit heavy/long, but nothing i wouldn&#039;t expect after giving birth. the side effects seemed to go away after a couple of weeks once my body adjusted and so far have not returned, nor has my period. i&#039;m also breastfeeding, so that may have to do with my lack of period, but i&#039;m not sure. either way, i&#039;ve had no issues with the medicine so far and hopefully that&#039;s how things will continue!"