"i got this implant about 10 months ago as birth control. first of all, my doctor told me it was nonhormonal because that&#039;s what i want (it has hormones. she lied.). i&#039;ve always had irregular periods, but after nexplanon they became constant and heavy. i get my period at a minimum of 3 weeks up max 3 months, and have at the most a week in between. my blood would be black sometimes- i don&#039;t think that&#039;s healthy.. my doctor refused to take it out and said i needed to give it more time, but i think this isn&#039;t working for me and from what i&#039;ve read it does similar to other people. it does its job all right- i can&#039;t have a kid when i&#039;m on my period all the time."