"i had the implanon inserted in august 2011. i like that i cannot get pregnant, my mood swings are just a little acting up and my eating habits are just the same. i&#039;ve gained just a little bit of weight, but nothing the gym can help with. the only irritating thing i have going on right is that i&#039;ve been bleeding since it was inserted. it&#039;s not heavy but light bleeding where it last for about a week. no cramping no crazy mood swings, like my doctor said everybody is different. you may bleed often or not bleed at all."