Implanon
"I had Implanon inserted in April, and I was breastfeeding at the time, so was having no periods.  However, after I stopped breastfeeding in August, my period started and hasn't stopped since.  It's November now, and I am giving it a few more weeks to see if this lets up, but if it doesn't, I"m getting it out.  I've also had cramping and bloating with it, which I hadn't experienced in almost 20 years until now."