when i get anxiety i shake uncontrollably too. what ive found helps is just putting all the shaking pressure in one of my legs and shaking it extremely violently. it may look crazy but atleast its one leg shaking instead of my entire body. i also find rocking back and forth helps really well. i know it may not be the best thing to do while in line for a job interview, but its better than entire body tremors.either way, good luck and hope your anxiety improves.