I wish I had advice or helpful words. I have a brother who also served in Afghanistan, but we have never met, but I often wonder if he suffers from PTSD.

I can only imagine what you and Your brother are going through right now. I hope you are doing well, and that he knows you are there for him. I am glad he is getting the help that he needs (I hope, I have not had experience with VA hospital.)
Keep us posted, please