I am an active, 138 lb, 5 2 , 71yo woman. I fell while backing up, landing on my lower back (center, right above my buttock crack) & hitting the occipital area of my skull on the concrete one week ago. I never lost consciousness, did not bruise or get any swelling on my lower back or skull. I remained alert, aware & got up after about 1-2 minutes. I sat down for 5 min., was driven home which was a few blocks away. I had a quiet day & fell asleep much earlier than usual at 8:15 pm. Since the incident I have had a very mild, ache in my head which is there all the time. I thought I d call my internist tomorrow & tell him about this. Is there any scan/test he can order to see if I have sustained a concussion &/or have a slow bleed 8 days after the fall? Thank you for your advice.