Etonogestrel
"I have had the implanon for a year and a half now and so far it's been great. No period at all except for a couple weeks a few months ago of random spotting. Recently though I have been experiencing horrible breast pain like you get when starting your period or when pregnant. (Never been pregnant but friends say it's similar) and it's been going on for almost 3 weeks.The only issue is every few months for about a week I get bad breast pain. This time it's longer. Anyone else have this issue?"