birth control
"I have had the Implanon birth control for almost 2 years now.  Ever since I have got it my sex drive has gone up, which is great, on the other hand though I bleed like crazy!  I will have a period for a week to 2 months sometimes.  Other times I will have my period then two weeks later have another one.  The bleeding is the only part that drives me insane.  I did gain a little bit of weight but it seems like most people always gain some weight when using a birth control.  Lately though,  I keep having thoughts and feelings that I am pregnant.  I don't usually have cramps but the last 2 times I bled I was in severe pain."