Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. When you are using the implant for family planning and it is in place (not displaced/expelled/broken) then it will continue to offer contraceptive protection. Irregular period is a known side effect of the device. So only pregnancy test would have been sufficient to exclude pregnancy and implant would have continued its function. The hormone you are prescribed for treating the irregularity also has a progesterone derivative as in implant. Both the things together increase the dose of hormone and in blood can result in bleeding after the pills are stopped. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Vasudha Jayant Athavale