Gina,
Beth is right.  You are not a mental case.  A few (!) years ago, I met Jesus Christ's older brother (he told me so himself and meant it).  THAT was a gentleman who had a few ... what's the word?... issues to work out!  

With your injury, you will have a few limitations.  Some people would let their accident be an excuse for everything that is going wrong in their life.  
You have taken a different and healthier approach.  You are bound and determined to be the person you are.  Going forth with living full time is proof of this and I applaud you for it! 

Do you think your neurpsychologist is accepting of transgendered individuals?  Given what you have written, it sounds like he is not.  Have you talked with a TG-friendly therapist about these reults?  She might put a different spin on what is being said.
Go forth and excel!
Chaunte