"8 weeks since getting nexplanon: my experience has been positive. insertion pain was minimal and mostly centered around the needle used to inject the medicine that numbs your arm. there was a bit of bruising for a week or so after insertion but since it has healed i haven&#039;t felt a thing. no acne, no weight gain (well, there is weight gain but it is from diet!), no mood swings and no pregnancy. my first period was a bit longer but way less crampy. for me, it has been a dream and i absolutely love it."