Thanks for your question on Healthcare Magic.
I can understand your concern.
Ecg I'd basically a screening tool for heart diseases. It is not 100% diagnostic. Some, heart diseases can be missed if we consider only ecg.
In your case, we should rule out
arrhythmia (rhythm disturbances in heart). Arrhythmia can cause faster heart beats without
chest pain.
So get done 2d echo and Holter monitoring (24 hours continuous recording of ecg).
If both these are normal then no need to worry for arrhythmia or other heart diseases.
Sometimes
stress and
anxiety can also cause similar symptoms.
So avoid stress and tension, be relax and calm.
Don't worry, you will be alright.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.