One thing that my neurologist Doctor Cantu (Boston) told me that has been extremely helpful in calming my anxiety is that the brain never stops healing. There is no coding in the brain that says "we won't replete these damaged cells." So, the brain continues to try to heal.

So, in essence, given enough time, and enough patience, you will definitely begin to see improvements. I am about 10 months in, and these headaches are horrifying, but the words that things will "definitely get better" keep me very positive. I hope it does the same for you and your kid.