Hi Neil
Welcome to NeuroTalk

.
You could check out the TBI/PCS forum (
https://www.neurotalk.org/forum92/). It is very active so if you describe what has happened to you I am sure that you will get helpful responses from other members.
As far as your PTSD is concerned, often non-pharmacological approaches like Cognitive Behavioural Therapy (CBT) are highly effective. Can you get your doctor to refer you to somebody who uses CBT with their clients?
All the best.