"this is my second time around using nexplanon. first time wasn&#039;t so bad. for the first couple of months i did not see my period which was something that they explained, and then when i did get my period it was very irregular. i also gained weight which was not so bad, i went from 155 lbs to 165lb. i lasted three years with it without getting pregnant which was great since those were the only two side effects i really had to endure. so i decided to go back on it for this time 4 years. what a big mistake!!! first of i am four months in and i have not stopped spotting. i also gained about 20 lbs that have been so hard for me to lose. i&#039;ve been exercising and just recently turned into a vegan, but still have not been able to shed the extra pounds!"