Hi tbeam,
I am so sorry you are suffering with this and dealing with unsupportive family during such a trying time. I know it is incredibly frustrating and hurtful. There are however, a lot of resources to educate yourself, your friends and family about PCS and TBI.
Two that I've been utilizing:
http://m.brainline.org and
http://www.biausa.org
There are also great resources up in the stickies for this forum. Check them out. I have been finding a wealth of knowledge and support from those who have been here for a while. I hope you do too.
You are not alone. Hang in there.