I've been on the Implanon since April 5th of 2010. I've been experiencing many problems with it ever since i recieved it. But early December i had a very dark (almost black) blood which i thought could be my period. But i've never bleed that much. And ever since then I've been bleeding everytime i use the bathroom. On top of that I've never had cramps before unitl now. And they are terrible, every day i have cramps. Even when i lay down for bed. Can anyone help me figure out whats going on or what could cause any of this?