I know exactly what you are going through. Magnesium is what your body needs (B5 too will help). I can always tell if my levels start getting low again when noises make me jump. For me, taking sea salt didn't help and actually made me worse. Sodium is an antagonist to mg so I guess thats why. Sodium or licorice didn't raise my blood pressure any. Drinking more water helps with blood volume and with the adrenals because the adrenals won't be getting too many signals to make more adrenaline (epinephrine) to stimulate the heart to beat faster.

I take anywhere from 800mg-1100mg of mg each day. Helps with the depression too <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />