I have had stress and anxiety so much before that I was vomiting and feeling physical pain in my chest and difficulty breathing and sleeplessness. I found that I had to make myself calm down and think good thoughts for my own sake. I focused just on my physical state and getting that under control. You can't function if you body is not well. Resting, yoga, meditation, sleep, crying it out, talking to friends, posting here. And a good antacid. Just mostly making myself go through the motions of providing sustenance and health to my body, with the firm knowledge that my mind can't heal while my body's being sick, and my body's not going to be well if I let the mind control it and make it fall apart.