Ay, I haven't personally experienced that, pero may kaibigan ako na nag-share na nangyari din sa kanya, super rare talaga but it happens, especially kung hindi properly inserted or may issue sa placement. Honestly, best to talk to your OB about this kasi they can check kung tama ang position ng implanon mo or kung may other factors, para ma-rule out lahat ng possibilities at ma-ease ang mind mo. Have you experienced breakthrough bleeding or any weird changes na nag-alarm sa iyo?