For myself I try a couple different things.
1. Do an activity that is relaxing and takes focus. Crosswords, puzzles, sudoku, etc.
2. Meditate or take a nap
3. Another form of meditation. Silently picture your happy place. Recite lists in your mind of things that make you happy or have a calming effect.

I find if I focus on the jitters, I end up having full blown anxiety attacks.

I have been diagnosed as having major depressive and anxiety disorders. I currently take Celexa. It works better for me long term than Xanax (3 yrs) or Prozac (2 yrs) did. I still deal with both disorders, but am able to manage without being in a fog or with the VERY ugly outbursts that I used to have.

For years and years I had severe panic attacks. The anxiety was awful. The doctor put me on 20mg Prozac and I have been great ever since, at least in that regard. You need to discuss this with a physician you trust and is willing to treat your whole body.

Ty.

Hope you can find some relief. 😇