You are under too much pressure and nervous. When you feel tired or very tired, I will teach you a way to relax. Close your eyes, sit or lie down in your most comfortable posture, take a deep breath, slowly ignore the outside voice, imagine that you can hear your breathing, and gradually imagine that there is a path in front of you, where there are many flowers and plants. Slowly, you see a house through that path. Imagine what you see and what color it is. Then you push open the door and imagine what is in the house.

I am a student of psychology. I had contact with a psychology teacher in China Normal University. This is the way she taught me. In addition, what you imagine is called image, which can analyze the pressure in your heart now. You can try this method, I hope it will help you.