Hi Emily and welcome.
While all brain injuries are different, the personality changes you describe are not uncommon in TBI survivors, especially when the frontal lobes are involved (Google
Phineas Gage sometime).
Your husband is relatively early in his recovery. I went through lots of personality swings and changes over the months as my brain learned to rewire itself. I’m now 20 months post injury, and while I know I’ll probably never be exactly like I was before, my wife assures me I’m now pretty close to my “old self”.
You may also want to read the book “
Where is the Mango Princes” by Cathy Crimmins; it a memoir from the perspective of the spouse of a TBI survivor.
Best to both of you on this recovery journey.