After a week it is unlikely that this bleeding is related to your concussion. It may be that you have a small scratch in your ear canal that is bleeding.
If this continues I would recommend you see your doctor to have this checked out. While it is unlikely, there is a small possibility this bleeding may be from a fracture sustained when you had the head trauma. Your doctor can help determine if this is the case.
Advice and opinions given are based on the information provided and must not be considered an official medical recommendation. The limitations of the internet prevent an appropriate evaluation. Always consult your doctor if there is concern.