I've scared myself silly. I've had a real panic attack as I just couldn't not breathe. Been hacking away for days and feeling generally very flu like. Cough been productive and sometimes totally uncontrollable. But just had the worst coughing fit of my life and honestly I thought I was going to stop breathing. I had to concentrate really hard and breathe into a paper bag to calm my breaths down. What the hell is going on? I don't have asthma or smoke.