"since i got this birth control implanted i&#039;ve gained 20 lbs and have experienced irregular bleeding. i have also gone through several pregnancy tests because the implanon gives me the same symptoms as pregnancy. i&#039;m nauseous, i get headaches, i&#039;m tired, i have cramping, and i have mood swings. however, it is nice that i don&#039;t have to worry about a pill, patch, or a shot every three months. it has never really been painful. i would compare the pain of initial implant similar to the depo shot."