Thanks for posting your query.
Let me know the following details along with mentioned.
Why was holter monitoring previously applied and what was the results?
Have you undergone eletrocardiography yet now?
With the available described symptoms, there appears to be possibility of heart arrhythmias; it can be proved after EKG.
You should consult with internal medicine specialist /cardiologist and should go for thorough check up.
You should also go for complete blood count
, serum electrolytes, electrocardiogram and 2 D echo.
If all above prescribed investigation are found to be normal then you should also consult with psychiatrist
There appears some component of anxiety
You should also take selective serotonin reuptake inhibitors along with benzodiazepines for relief of your symptoms.
Dr. Mayank Bhargava