Is it Akathisia?
Akathisia is more than just external movements or the need to move. Part of akathisia is a strong subjective element that can manifest as an agitated depression. Read here how some people have described the horrors of inner akathisia. The anxiety or depression you are experiencing could very well be a side effect of your medication.
Check out our these links to the scientific literature to help you communicate with your health care providers more accurately.
Includes scientific studies, information on how akathisia can present, information on other movement disorders that are related to akathisia, and the testing scale used by doctors to evaluate movement disorders.