Etonogestrel
"I got the nexolanon implant in September 2015, yet I'm still having side effects. My periods are incredibly irregular, either having them one after the other immediately or not having any at all for at least 4 months. When I do get my periods, they're either extremely heavy or barely even there. The cramps I get are unbearable, so if anyone wanted nexplanon.... don't even bother thinking about it."