Possible causes that may need to be considered include GI causes such as infections/ inflammation, motility issues, GU infections, inflammations, stress/ anxiety, medication side effect, hormonal/ endocrine issues, causes related to the
respiratory tract/ cardiovascular system, autonomic disturbances etc. I would suggest considering an initial evaluation by an internist and depending on the cause(s) diagnosed/ suspected, it can be managed accordingly or specialist(s) care may be sought.