Does anyone else with the Nexplanon implant feel that they're periods are "triggered" by sex? I will go weeks without a period and then suddenly find out I have started either during or following sex and the period will last anywhere between 2-6 days. I should add that since getting the implant that my periods are completely irregular (with months between some and periods and spotting that will span a month). Does anyone else seem to have this issue and is there anything that I can do?