My symptoms are very similar to yours. I have suffered for years from the internal vibrations, tinnitus and arms falling asleep. It too has taken a toll on me. I have been to countless doctors and naturopaths with no happy results. Recently, I came across an article discussing low stomach acid. I never would have thought that this is something I have, as I do not have reflux, however after doing several morning tests with baking soda, (you can google this) I have finally found some relief. I am taking absorbic acid in the form of vitamin C with my breakfast and dinner meals. I am also taking a digestive enzyme. The idea is that the increase in stomach acid helps food and nutrition to be broken down easier. For me, I believe that improperly digested food is causing intolerances that are causing my tremors. I am also taking Vitamin d and the sublingual form of B12. It has only been two weeks and I do have a little shaking upon waking, but I feel that I am headed in the right direction to getting better. Good luck to you in finding help.