For the last 2 years I ve been getting shortness of breath and lightheartedness, it s a winded feeling without doing any physical activity. I ve been to the pulmonary doctor, cardiologist, gastrointestinal doctor, and ENT, and allergist. They all have done every test possible and everything was negative. There has to be something wrong; I was told it s anxiety and it s in my head, but I don t feel anxious at all. Please help!