Thanks for using the forum. I am happy to address your questions, and my answer will be based on the information you provided here. Please make sure you recognize that this forum is for educational purposes only, and it does not substitute for a formal office visit with your doctor.
Without the ability to examine you and obtain a history, I can not tell you what the exact cause of your symptoms is. However I will try to provide you with some useful information.
In general, following head injury that involves episodes of loss of consciousness, headaches and confusion can occur. This is termed post-concussive syndrome. A normal MRI of the brain and EEG are reassuring, and most often symptoms resolve over weeks to months. If there is continued concern for mental slowness or thinking troubles, neuropsychological evaluation (standardized tests administered by a trained neuropsychologist of cognition, reaction speed, attention, memory etc) to quantify the extent and nature of the thinking troubles can sometimes be helpful.
It sounds like you were involved in a very traumatic experience, and if there is anxiety depression and stress related to an assault, post-traumatic stress disorder symptoms can contribute to the cognitive dysfunction and mood symptoms and headaches.
Continued follow-up with your physicians is recommended, and psychological counseling after this stressful ordeal might benefit you as well.
Thank you for using the forum I hope you find this information useful good luck.
Thanks very much Doc for ur helpful advice. I'm pretty much already following what you advised. My Neurologist wanted a psychiatrist's opinion before she can start me on any medication. The pain seems to me as neuro-psychological and am happy to already have got the treatment started