Yes a couple of things I would add.

I get an internal tremor. Mine is related to adrenal fatigue type sysmptoms. You might want to check that out. I also get it along my nerves from a chronic viral infection I have. You might want to ask you doc to check you for viral infections they are often a cuase behind many inlnneses including fibro. Viruses like HHV6, Epstein Barr, Cytomegalovirus etc.