Etonogestrel
"I have had the Nexplanon since 4/2015 and it has been a nightmare ever since.  I just contacted by doctor today about having it removed.  I have had extremely long periods ever since it was implanted and the only reason I have not taken it out before now is because the only other option for me is the BC pills which I'm afraid I will not remember to take daily.  I've have no weight changes and no acne.  But I'm always cold and eat ice a lot, which are signs for anemia and I'm experiencing headaches more regularly than I use to.  But the long periods are just unbearable and I've had enough!!! Hopefully I will soon have this removed.  I would NOT recommend this contraceptive at all!"