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Stress- Anxiety- Panic- are all in the same spectrum... / could well be responsible for your symptoms...
However, it is often an exclusion diagnosis and investigations are often advised and preferable... EKG / HOLTER (24 to 48 hour ambulatory monitoring) / ECHOcardiogram
/ TMT (Treadmill exercise ECG) / LABORATORY work-up – may all be necessary for further assessment and assistance.
You have not stated your personal habits, family history, or co-morbidities, even age, gender...which could have an influence on the diagnosis and outcome...
The treating doctor may suggest depending on need, based on his assessment of the situation.
Wishing speedy recovery