Here are a couple of articles about post-concussion headache that were very helpful for me:
https://www.braininjurymn.org/librar...esAfterTBI.pdf
https://www.braininjurymn.org/librar...icHeadache.pdf
I echo Mark's suggestion to get on board with nutritional supplements. That can help a lot. Also make sure you are getting adequate physical and brain rest so you are not overtaxing yourself.
Hope you get to feeling better soon!