@gabrielm do not give up with tests. My doc just said stress without even looking at my labs.... which were pretty normal but still.... also have been told it is all in my head in another group.... i will rule out everything before i settle with it is really a breathing problem.... something has to be there with so many of us struggling..... especially us not even diagnosed with anything but guesses. Its unfair because this problem can be soooo bad and nobody can do a darn thing but make you a guinea pig and wait.... if it is a hypervent issue there has to be another way to help this for good. Besides breathing exercises. Who wants to do those all day. There has to be something else. We have to find it. All kt takes is one result to be missed or not taken seriously or one doctor to mess up to overlook something to make us clueless. I really feel it is something othar than just over breathing... WHY?