This sounds EXACTLY like what I went through and am going through... constant state of fight-or-flight ever since puberty... always shaky, nervous, jumpy, even being bumped into or had my name called out my heart felt like it would explode out of my chest, with this terrible anxiety in the pit of my stomach. And now... somehow that's all mostly gone, replaced by these symptoms. I've also started passing out and everything is getting worse too fast for me to keep up with. It's becoming difficult for me to even get on here and make replies... even though I need to, in attempt to save my damn life.
I can't even handle any form of vitamin C though, nor have I ever been able to... since one of my major issues is gut/GI problems, and very poor digestion/low tolerance of most things that are supposed to be "helpful".
Let me ask you though... have you ever tried anything like Ashwagandha, or Rhodiola, and had any success? Everyone keeps suggesting these, but for me when I take them they just make me SO MUCH WORSE... more shaky/nervous, extremely jittery, and the worst stomach pain ever...