Suggest Treatment For Headaches And Tiredness

I m a Medieval Combat Re-enactor and this time last year is was in an accident where a large number of people in armour fell on me. I fell badly and hit the back of my neck at the base of the spine with the edge of my helmet. I was treated at the scene by paramedics and considered to be okay. Howver, a few days later I was feeling unwell and so went to A&E. I was scanned and they noted a swelling at the point of impact and borderline for an operation. I was sent home with pain relief. I have have since seen an osteopath (6 visits) which has cleared me of many of the problems regarding pain. However, it has been noticed that I have since been having mood swings which include unreasonable anger (not violent) for minor reasons. I have also had headaches that are unusual for me in that they are either a pressure like pain, sheet like upon the top of the brain or through the brain, or a stabbing sensation on the left side to centre. I have also notice actute tiredness after even a restful period.