A couple of years ago I started feeling anxious. I get days where I don't feel so bad and then I feel nervous again. I honestly can't figure out what triggers this. I've had a bunch of medical tests and a couple mental health assessments. They keep saying it's anxiety or stress related. I've never experienced this before.  I get shaky, an upset stomach, have trouble sleeping, trouble concentrating, vivid dreams, and an empty feeling when this happens.