Everything you mentioned is what I am experiencing and more. They seem to bite! Travel very fast throughout when I am perfectly relaxed or lying down to rest. Starts with my thigh, tremors, like a stampede of things moving around rapidly then to areas once did traveled. The nose, ears, down my arms back, butt eyes. I too feel my mobility is effected, sometimes light vertigo, and I feel like some of my memory is affected. Lots of testing resulting in no parasites present. Must be in my head! Now I believe it is literally IN my head. Where can we get help!