Thanks for your question on Health Care Magic.
I can understand your concern.
In my opinion, you are mostly having
stress and
anxiety related palpitations.
But better to rule out
arrhythmia (disturbances in heart rhythm) because this can actually also cause similar symptoms.
So get done ecg, 2d echo and Holter monitoring (24 hour continuous monitoring of ecg).
If all these are normal then no need to worry for heart diseases.
Stress and anxiety appear more likely in your case.
So avoid stress and tension, be relax and calm.
Consult psychiatrist and get done
counselling sessions. Try to identify stressor in your life and start working on its solution.
You may need anxiolytic drugs too.
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.