Like you suggested Xanadu00, I started to say brain injury instead of concussion and that does seem to mostly help. Though, there have been a few people that roll their eyes and comment on how I'm exaggerating, sometimes accompanied with a comment that I must really love the attention or something.
Those people I've taken to flipping off and telling them where to go in no uncertain terms... I figure anyone with an attitude like that is not someone I want to talk or associate with anyhow.
Actually, once or twice, people have come back to me after I flipped them off and told them where to go and apologized. That behaviour is not really typical of who I was pre TBI, so sometimes that's a change they notice and can relate to and maybe start to get it.
Mostly I just avoid talking to anyone about it... I do my best to stay true to my long time hermit ways

Starr