I used to suffer from severe anxiety myself. I was put on several different medications for it. I found counseling to be a of a great help to me when I was going through the anxiety. It really wouldn't hurt for you to be seen by a neurologist just to rule out any possible causes of the shaking. I too used to shake like crazy when I was on certain medications. I worked with my psychiatrist and we were able to stop the medications that were causing this. Good Luck to you in your endeavor to find out what is causing it.