Uy, I feel you, a few of us mums with implanon din nag-experience ng ganyan, and honestly it could be related pero hindi rin guaranteed kaya best talaga na i-check mo with your OB para sure, especially kung prolonged na siya ng ilang weeks na. Might be something else entirely, or it could be how your body's reacting to the hormones pa, but your doctor can do proper exam at give you peace of mind, alam mo? Wag nang mag-alala lang kung ano-ano, kausap mo na agad yung doc mo so you know what's happening bago mag-expire pa.