"i&#039;ve had nexplanon since late october of 2012. at first it seemed great the not having to worry about taking a pill everyday at the same time. mainly that&#039;s the reason why i choose nexplanon in the first place, but over the many months now i&#039;ve experience lots of negative things about it in my perspective. 1) huge weight gain like 20-30lbs 2) lots of headaches. 3) x2 the acne 4) more stress 5) my emotions are much more sensitive than they ever were. i cry a lot more now; sometime i have no idea as to why i&#039;m even crying in the first place. just to much estrogen to handle after being in my arm for so long now. 6) my periods are very irregular now. sometimes i&#039;ll spot, sometimes i&#039;ll bleed for just a day."