"i have used implanon since january 17, 2008...at first i didn&#039;t feel anything and thought this was the best method of birth control...however as time progressed i have experienced a lot of negative symptoms....i have gained weight, my breast are constantly in pain, i have lower back pain and my mood swings have become the worst. it&#039;s gotten so bad because i get mad at the smallest things and can&#039;t control my attitude. i do believe this is one of the best methods of preventing pregnancy but just hate the side effects that come along with it."