Carebear,
Although your symptoms could be from GAD, the fact that you just had a head injury concerns me. You are also on medications that can have side effects. I'm new here, so I hope I'm not overstepping my bounds, but have you told your Dr. that you are having these problems? If your symptoms are from the injury, it should be ruled out. If they are from the medications, doses or medications can be changed.

i'm sure you know that when you are anxious already, and then have an injury or other problem, the two feed off eachother. There are some self hypnotic videos on youtube that may help temporarily. If nothing else, they get you to concentrate and slow your breathing. Just google youtube self hypnosis and it should take you there.

I hope your symptoms start to dissapate soon.

Sam