Welcome to HCM
We understand your concerns
You said that you visited GP, osteopaths and breath therapists but you did nopt mention what they told. Were pathological tests done? There may not be any problem with chest and bones as the GP and Osteo are clear,
I suggest it might be some trouble due to gastric trouble and this happens often. Try garlic every day morning before food and see for a week. If no difference found consult a gastroenterologist
Get well soon.