This one is right in my corner of knowledge. First of all, do you have COPD? Secondly, are you on continuous flow or puff flow meter? Third, what kind of medications due you take?

Now, this is all part of the fear of not being able to breath. You seem to go right into a panic attack and that worsen's it. Did you ever talk to your pulmonologist about this. They do go hand in hand ya know. You might consider talking to your doc about this and perhaps coming up with some answers. Have you tried the method of breathing in through you nose and then blowing out through your mouth fast and long like trying to blow out candles on a cake? Your CO2 levels when you hyperventalate have alot to do with this also. You getting more CO2 then your getting O2. Talk to your doc about it and see what he says. Your doctor is alway your best path to wellness. We are here for you and looking for some news on how you make out.

CD