Taking to someone I trust, taking a hot bath in candlelight with good smelling Epsom salts and listening to something soothing such as nature sounds, a gentle audiobook or soothing music can help. Dunking your face in ice cold water is suppose to help also but I haven't tried it. I used to exercise and take a walk which helped burn some off sometimes. Good luck finding something which works for you.....high anxiety is hideous.