Thanks for your question on Healthcare Magic.
I can understand your concern.
In my opinion, we should rule out
arrhythmia (rhythm disturbances in heart) in your case because your symptoms like fast heart beating, flushing of body, pounding sensations,
chest tightness etc are commonly seen with arrhythmia.
So
consult cardiologist and get done
1. Ecg
2. 2d echo
3. Holter monitoring (24 hours continuous recording of ecg).
If all these are normal then no need to worry for arrhythmia or other heart diseases.
Sometimes stress and anxiety can also cause similar symptoms.
So
consult psychiatrist and get done
counselling sessions. Try to identify stressor in your life and start working on it's solution. You may need anxiolytic drugs too. Avoid stress and tension, be relax and calm.
Don't worry, you will be alright bit first rule out arrhythmia.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.