Yes that's strange how anxiety works that way, isn't it? Sometimes I know it is coming on and sometimes I do not. Anyway, a few things have helped me, not in any special order or priority: acupuncture, support groups, some counseling, meditation, guided imaging, praying, medication (I take generic version of xanax - a very low dose and sometimes I only take half of that - but it is enough to take the edge off). One exercise in particular tht has helped me is breathing awareness and autogenic phrases from the book Freedom from Pain (sorry Maybe look into some resource books on relaxation? Also regular exercise helps as does no alcohol. I've read a lot on alcohol use and it actually increases your cortisol levels.