Insomnia One, Drugs Zero

Sleep eludes me tonight. 
I have taken the appropriate doses of the appropriate pharmaceutical cocktails, to no avail.  I know this feeling.
It is born of anxiety, of a tightening in the muscles at the back of my neck, and in my diaphragm, restricting my breathing.  I have to pay special attention to the jaw muscles so they don’t get stuck, Heaven forfend.