"where do i begin, i have been on nexplanon for about a year and a half now. there was no pain getting it put in, easy, even for someone who is terribly afraid of needles. the real problem was after, i got so moody and crazy that i would start to cry about it. i was always apologizing to my boyfriend because i felt like i couldn&#039;t control my moods. it went away after a couple of months but it comes back here and there. second, the weight gain. i have never weighed so much in my life, i gained about 30 lbs in the last year, regardless of how healthy i was eating. third, the acne. i broke out like crazy! oh and i feel nauseous all the time. the positives now. it controlled my severe cramps. i get a lighter period, even skip it sometimes."