"i got the nexplanon in feb 2013, i had a period for a full 2 months now i am spotting lightly. i have back pain a lot, which is unbearable at times. but before this i had pains in my abdominal region, which was so bad i couldn&#039;t walk. with my nexplanon i have no pains there anymore. although i could go without the mood swings and depressed feelings at times. so i hope this helps you ladies and i to could use some help, what other side effects are there i should be aware of."