Excessive tension, muscle pain (generalized anxiety)

My muscle tension is very chronic; it makes it hard to breathe, and it causes symptoms when I eat because I feel extremely constricted in my body. My back and neck hurt, my legs tremble when I walk, and I feel tension in them as well. It's so bad that the more I walk, the more I feel short of breath in my chest and back, my temples burn, and when I wake up, my arms are numb and my back hurts. I don't know what to do anymore. I would really appreciate your best advice. It makes me feel awful, especially in the mornings when I eat breakfast; I feel like I'm going to faint. :'(