is this just anxiety or more

hi,

I have been suffering from anxiety for approx 2 years.  I feel like i am in a state of panic some times and my mind is racing.  I have been suffering  with my health over the last two years.  Aches pains and not being able to sleep.  my doctor has tested me for various things all negative apart from high end liver enzymes.  Although the doc say's it satisfactory.  I find it very difficult to concentrate at work.  I feel sick sometimes and have a tinggling feeling over my body.  I also have tinnitus.  I find it very difficult to relax and I always feel on edge. My doctor has referred me for cbt.    Has anyone had the some same symptons and does cbt work.

thanks in advance