The "you look fine" comment is very common. There is a 6 segment YouTube video called "You Look Fine" by John Byler. It is at
http://www.youtube.com/watch?v=x9Xso...ature=youtu.be
It takes about an hour to watch all 6 segments. If you can get close family to watch it, it will be helpful. It addresses your issue exactly.
Regarding Christmas activities and travel. This would be a good year to tell everybody you need to stay close to home and out of the social situations. Maybe you can say your NeuroPsych says to lay low. It is just not worth the risk. If anybody complains about you staying home, suggest they watch the YouTube series. Tell them to just be glad you walked away from your cycle crash. Since you were in such a large group, the outcome could have been much worse.
Check out
http://www.brainline.org/content/201...u-to-know.html
It also has good information.
Just know that you are not alone at having a slow and quiet Christmas. Many of us need to stay quiet.
My best to you.