My Implanon Is 2 Years Expired. I've Had A Regular

My Implanon is 2 years expired. I've had a regular period for the last 8 months. This month my period is 21 days late. could I be pregnant with the implanon still in my arm. The Implanon is still in my arm because the doctors can't locate it, they have tried everything x-ray, CT scans, ultrasounds. I'm waiting on the results from my blood work as we speak.