Thank you for the query.
Chest burning, left arm numbness
and shortness of breath
can be caused by heart disease
and should be always checked with ECG and heart enzymes level. Stress test
and heart ultrasound should be also performed.
If no heart problems, symptoms are caused by either acid reflux disease or peptic ulcers. Shortness of breath can be caused by asthma disease which is very often associated with acid reflux disease.
You should have upper GI endoscopy, abdominal ultrasound, and blow test (spirometry performed).
Avoid coffee, chocolate, fruit juices, fatty foods, soft drinks. Drink more mineral water.
Hope this will help.