Hello, this post made me feel less alone, I started experiencing the exact same symptoms out of the blue in May of 2022 and saw so many specialists and no one could give me answers. My therapist thinks it’s a form of tourettes, I’ve been diagnosed with depression, anxiety, and OCD lol but this kind of came out of left field. I’ve tried doing breathing exercises but nothing is helping and it exhausts me and makes me feel hopeless on fixing my breathing! But I’ve read other stories on this as well and other people have it and it’s been diagnosed to them also as a mental thing but on the plus side some people have learned to manage it so that’s a hopeful thing! I truly hope we get some answers and hope life goes well with you while dealing with this.