My 23 year old daughter has post concussion syndrome. She has extreme head pain. After two years of suffering with it and getting no lasting help from meds. I started searching on the net for solutions. We seem to have hit on some. Look up " balance exercises on the net ", these are usually for people who have suffered strokes. For some reason when she does these exercises it diminishes her head pain ! Also, people who have suffered a concussion seem to be developing strange environmental allergies. Even though allergy tests all come back negative. It is some kind of an intolerance. We have discovered that if my daughter has any kind of milk products her face swells up as well as the back of her head. It feels like she has extreme pressure. The only thing that takes it away is decongestants and avoiding milk products. So keep a watch to see if your head pain is associated with anything you are consuming.
Good luck I hope you are well soon.