What is my body trying to tell me??

Samantha
I had the implanon inserted December 2013 because I started nursing school in the spring and I knew I couldn't handle a baby, but I have had really bad irregular periods! I am having my period 20+ days every month then I'll be off for around 5 days and then my period will start right back! What could my body be telling me? Could this affect my chances of fertility in the future?  Help please