<s>[INST] I have lower left abdominal & back pain , I just began using implanon . They inserted it the same day of my surrgical abortion for the first day I had heavy bleeding then it stopped , now every day I have bright red bleeding in the morning or afternoon & brown spotting at night. The pain is strong , and certains parts of my left leg & foot go completely numb ?? , [/INST] hi,thank you for your query.Implanon is an etonogestrel class of contraceptive used to prevent pregnancy.the common side effects include spotting and pain at the site of insertion.You may also have some spotting between periods, especially during the first several months of use. If bleeding is prolonged (more than 8 days) or unusually heavy, contact your doctorbut having lower abdominal and back pain which is persistent,along with bleeding and numbness of left foot is an serious problem which needs attention right away.kindly contact your doctor for an appointment and further medical advice,thank you,wishing you good health </s>