Has anyone else found that you can have a tight chest yet no dip in your peak flow. Other times my peak flow will correspond to how I'm feeling but often it just doesn't! and GPs act like its the best thing ever ! If i have a good peak flow whilst I'm in the docs they'll just act like I'm right as rain (and therefore must be absolutely fine outside of the docs too) and send me away. I just don't always feel that it's an accurate measure of how I'm feeling.