Hi. I am currently on the implanon birth control but it was suppose to be removed in 2015. I have been sexually active and not protected. At first my periods would come around the first of the month but after the period i had in november my period didnt come until the end of the month of December! Was suppose to cum around the first but when it came my thoughts of being pregnant went away. Now it is january and i am having very bad lower back pains and headaches. My appetite has changed completely and my breast are always sore. Could i be pregnant? And if i am could something be wrong with my baby because of the implanon?