"i was on nexplanon for about 20 months, two months after having a baby. i&#039;ve given it a rating of &#039;3&#039; simply because i did not fall pregnant. i did not have periods but the bc often made me feel pregnant, leading to me testing several times. other side effects included: unable to lose pregnancy weight, despite breastfeeding and regular exercise. breast cysts (which i cannot confirm was a result of nexplanon, but the bc does increase the likelihood). headaches for the first five months (as in, i had a headache for three out of every ten days). low and bad moods - i had a well of anger that i could just reach into. anxiety. brain fog. fatigue. in short, i really lost myself. i&#039;ve been off for a month now, and feel like the old me again."