"i am 23 years old. i got the nexplanon right after my son was born. the 2 first months i bled like usual than i began getting 2 periods per month. that lasted about four months. i did see lots of blood clots and dark brown blood for several days when period was ending. i&#039;ve been on this contraceptive for over a year and 3 months and the bleeding still is no joke. besides the long unpredictable periods i had no other side effects."