Hi, I am facing breathing issues from last 3 weeks. It starts with difficulty in breathing which if continues leads to severe headache, my body start shivering and feel dizziness. Few days back, i started facing this issue when i was in office and i was admitted to hospital. Several test like potassium test, ECG, bp  was done but all in vain. Doctor says its due to stress but i know that's not true. Please suggest what to do.