"but I read an article about the energy cascade following a concussion, which mentioned something about overstimulation and setbacks possibly leading to programmed cell death." It sure does not sound like you are subjecting yourself to over-stimulation.

If you continue to keep looking for information, especially by googling, you will prevent any improvement. You will likely be able to find many articles that sound dreadful. I've read many of them, too. But, as I read them, I find that they have very limited application because the study parameters were very narrow so as to look at a limited aspect of concussions. There is an old saying, "The devil is in the details."

Many on NT have taken an extended time away from NT and researching on the internet to just try to do something. It does not need to be a career effort. It helps to just do something to stay busy. There are many non-overstimulating ways to stay busy.

btw, 1 day was not a recovery. It was just a good day when a number of factors came together at the same time. You sound like you are beating yourself up for the over-stimulation. Many of us can tell you there is no rhyme or reason to most relapses. It is the roller coaster of PCS.

What are you doing to reduce your headache pain ? Headaches alone can be a big cause of other symptoms.