I know how you feel. I have had that type of anxiety before. I have had headaches and discomfort in my chest.
Do you have any pets? If you are feeling anxious, snuggle them close and pet them. If you have a dog, going outside for a walk is beneficial. If you have a cat, stroking and petting it and hearing him/her purr is very relaxing.
What kind of hobbies do you have? Do you like to read or engage in more physical activities. I like both.
Hope you are feeling better soon.