Hello and welcome. I can't say I've heard of a case exactly like yours.
I had a TBI with skull fracture a couple years ago, but was fortunate to have received an immediate craniotomy to relieve the pressure from the hematoma, and after several months of speech and occupational therapy I’ve substantially recovered.
This was fifteen years ago? What therapies or other evaluations have you had? Have you, or are you seeing a neurologist or clinical neuropsychologist?
You may want to check out the forum on TBI/PCS.
http://neurotalk.psychcentral.com/forum92.html
Best to you.