I get that too, especially with high anxiety, which I am experiencing now. At first, I thought it was my heart but then noticed my pulse was slow and the shaky feeling was still there. Comes and goes. Hope it goes away for all of us dealing with it. Take care!
I had the my first shot of covid vaccine two weeks ago which gave me side effects for almost two weeks, very scary stuff, i was feeling disoriented, foggy, found it hard to hold my balance sometimes and would wake up feeling like im shaking
I think maybe it's the other way around, something sounds like it happened to cause anxiety and that's why you're suddenly not sleeping. Anything going on lately?