"i started implanon december of 2009.  everything was wonderful for the first year and a half.  i didn&#039;t have my period or pms symptoms whatsoever.  less than a year ago i started having pms symptoms and within 3 months i started having my period again without any reason or cause.  what is my worry is that i am ovulating and i am not sure if it is working anymore.  my periods have been worse than when i was on the pill.  i also didn&#039;t like the cost of the implanon. due to the cost and the fact that i am not even sure if it is working anymore, i can&#039;t say i have been happy with implanon."