capt.,
Welcome to Neurotalk. This is a wonderful place to ask questions, learn about has worked and not worked for others, and just participate.
I'm sorry to hear about you hitting your head a few times. Roller derby sounds like fun. I hope the dr.'s figure out what is going on.
Below is a list for concussion and anxiety:
http://neurotalk.psychcentral.com/fo...aysprune=&f=50
http://neurotalk.psychcentral.com/fo...aysprune=&f=92