"hello, i first had implanon put in during 2010, i never had mood swings or anything of the sort. i however had a normal period for 11 months and then nothing for 5 months and then a period for a month. i went to my obgyn they sent me to get an internal sonogram to see what was wrong. they couldn&#039;t find anything. but i read someone on one of these forums that changing my diet and exercise would help. and it did. if i exercise 3 days a week and eat relatively healthy i no longer have a period. and it&#039;s the same for my nexplanon which i got put in during 2013."