This happens to me and im pretty positive that its anxiety related too. I dont know if theres anything that you can do, but you can visit your doctor and they can put you on meds your aleviate some of your anxiety

It is DEFINITELY anxiety related. I feel so bad for you because I know exactly what you are going through. I had this for YEARS and even though I was diagnosed with anxiety a long time ago, it still scared me to think I wasn't breahting properly. I went thru all the steps to convince myself I wasn't dying. I had ECG's and echocardiograms and I did a treadmill test and pulmonary function tests. The doctor FINALLY convinced me it wasn't real and for whatever reason when I finally believed it was just me I actually had it stop happening. Anxiety is the mots annoying disorder in the world. It's pointless and a waste of time for sure, but don't worry. There is help out there.