So I've been able to exercise for quite a while without issues, and my peak flow readings are always solid, like around 550-600, and I'm 17 and about 174 cm tall. But lately, I've got this minor cold, and I've noticed something weird. When I breathe normally, I don't hear anything strange, but when I try to exhale really fast and hard, there's this wheezing sound. Is that normal? Could it just be anxiety causing this wheeze? Just trying to get some clarity on what's happening.