"new neuro prescribed 25mg of nortriptyline. After 1 week, he titrated up to 75mg at bedtime while still taking the 900mg of Triliptal. Foot pain has decreased somewhat but now the trambling/shaking of my hands has increased."

did the trembling start straight after the nortiptyline? I had exactly the same. Also eg when I clasped my hands in a preying motion and squeezed hard my arms would wobble like crazy. I stopped the nortriptline after 1 week and my full strength came back and no shaking, second time I started back on the nortriptyline the trembling returned.