I was just reading some of the people with AF on another support group used a machine called Bio Tuner(Cranial Electrotherapy Stimulation). I have never tried it. People said it helped them sleep and helped with anxieties.
\What I understand about stress and the body, the stress makes you loss minerals from the body such as zinc, magnesium in the cells. In place of those minerals goes usually copper which will over stimulate you. I wish I new this years ago when I had these sleepless/ stressful times.