I don't know. I was assaulted over 6 months ago. I can't remember if I was knocked out or not - but I don't think I was. I have severe fatigue, memory loss, no concept of time and my processing speed is stuck on extra slow. It is miserable. I know what you are going through and hope you recover completely. I don't think I am going to get much better. Sometimes I feel like it is stupid to keep trying. I've always known that life only promises misery and loss, but I never thought this would happen so early in life. PS - doing research will probably just give you more headaches. From what I have found there is complete disagreement between many "doctors" on this. None of them can seem to help or offer any explanation.