Post ACL, Achilles pain

Patient: I am now 6 months post ACL reconstruction. I have returned to full activity again and I am currently running 3-4 miles a day on the treadmill at my local gym. Recently I have been experiencing what seems to be Achilles tendon pain in my lower inner calf (the same leg my surgery was on). Can this be a result of over compensation of my knee? Should I be worried? The pain increases the more I run and continues after running.