Simple question first: Does it ever get better?

I should first say that my own symptoms are so much less dire than many of you on this board that I feel somewhat abashed about asking for help. Mine was a diffuse axonal TBI caused by shaking my own head too violently. The first two weeks afterwards were filled with overwhelming exhaustion, and other common symptoms.

I got on a regular regime of the supplements recommended on this board. I have tried to get more rest, but I tend to do 5-6 hours of sleep/night Sunday-Thurs, and 7-8 hours on weekends. I am now back to cycling three times/week and exhaustion has largely subsided.

What I use to gauge my progress towards total recovery is my tolerance of white flour, which now gives me mild headaches. I *never* used to get headaches, even after the occasional night out on the town. I figure that until the white flour headaches subside, I shouldn't mess with the constant bouncing motion of jogging.

So, three months after initial injury, I'm still on all of the supplements, but a half-slice of toast will still give me a headache. A recurring theme on this board seems to be slow-to-non-existent healing progress. This seems odd, considering that pro-athletes seem to bounce back in weeks. Is it their youth? I am 44. Or do I just need to be patient, go on a Zen retreat to calm the brain, and get more sleep during the week?