Last night I was going down the stairs to sleep. I mis-stepped in some way and fell down about 5 or so stairs. At the time I only noticed my butt/tailbone taking a hit. However immediately after my head started hurting similar to when I had a concussion last year. Not nearly as bad, but about 1/10 of the pain. It's still hurting today, but I checked my head for where it may have had an impact. Nothing hurts when I press it, and when I had a concussion, there was certainly a bump from where my head hurt. I really don't remember hitting my head, so I don't think that's it. The pain is in the same spot as my head injury last year. Is it possible that my head hurts from just being whipped around during the fall? Is it possible that even though it's a year later with no issues, I exacerbated my old injury? Thanks in advance for any information.