"i had nexplanon inserted on nov. 20, 2016. it is jan. 20, 2016 and i have bled every single day. there was a week of much heavier bleeding and maybe two weeks of moderate bleeding, the rest have been light to moderate without stopping. 
some research suggests that ibuprofen every 6 hours as prescribed or doxycycline twice a day as prescribed will help to settle the endometrial lining however, neither has worked for me."