"the first two weeks of being on the nexplanon was the worst. i had my period and my arm from the insertion was hurting like anything for the longest time. one thing i hate about this birth control was the weight gain. i started the nexplanon in may 2014 and ever since then i gained 17 pounds. no matter how healthy i eat or how much i exercise, i cannot lose the weight. not only was the weight a big downside, but i was so moody all the time and lost my sex drive. the only good thing about this birth control was not having my period for over a year which can also be a scary thing for most people. also it is 99.9% effective so i felt very safe on nexaplanon. however i do not recommend this birth control option."