Hello treevoice: I don't really have anything in particular to suggest here.

I'm an older person. I experience kind-of a low-grade tremor throughout my body 24 / 7. It's not so much that anyone else would notice it. But I feel it.

I don't know what causes it.

I have a long history of anxiety. It has been suggested to me that it might be related to a magnesium deficiency. I haven't pursued this though. I'm not into supplements & all of that stuff myself.
Are you familiar with PsychCentral's sister website: "NeuroTalk"? I'm a member over there as well. There are some very knowledgeable members over there.

They might have some useful suggestions for you with regard to what you're experiencing:
NeuroTalk Support Groups