Hi THTE and welcome.
I am guessing from the sound of your history, that you have been dealing with this anxiety for awhile? If you previously were on Lexapro, then you probably know that this medication can take up to several weeks to build up, level off, and for your body to adjust and noticable changes become apparent.
For now, I believe that you could definitely benefit from some self-help techniques that you can do at home, starting immediately.
These will help to lower your overall anxiety levels, and should also reduce your physical symptoms.
Keep posting with us as well. Just having support is a big part of feeling better. Post anytime.
Scaredy Cat