Thanks for your question on Healthcare Magic.
I can understand your concern.
By your history and description, possibility of stress,
anxiety and panic disorder is more in your case.
But better to rule out heart diseases first as heart diseases also cause similar symptoms.
So
consult doctor and get done blood pressure monitoring, ecg, 2d echo and
stress test (trade mill test).
If all these are normal then no need to worry for heart diseases.
Sometimes uncontrolled stress, anxiety and panic disorder 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.
Don't worry, you will be alright with counselling sessions and anxiolytic drugs.
Avoid stress and tension, be relax and calm.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.