The benzo fatigue is made worse by the combination with Neurontin. They multiply the effect of each.
The Elavil might be helpful but combining it with the benzo should be considered carefully. A psychiatrist may be worth a consult, especially if you can find one with PCS experience.
Have you considered getting a neuro-psychological assessment? It might be worthwhile. Before you go much farther with your Work Comp case, check out
www.tbilaw.com. Attorney Gordon S Johnson has some very good information regarding protecting yourself from insurance companies.
Concussion claims with Work Comp can be very problematic. You want to be very careful as you present your case.
Regarding a neuro-psych assessment, it is not uncommon for some erroneous diagnoses when assessing a PCS subject. Some of the test will overlap PCS symptoms with depression symptoms. The depression diagnosis can be a problem. Been there, done that, lost my case.