Thanks for your question on Healthcare Magic.
I can understand your concern.
By your history and description, possibility of stress and
anxiety related symptoms is more.
But since you are having palpitations, sweating,
dizziness etc, we should first rule out heart diseases like
arrhythmia.
So get done ecg, 2d echo and 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 uncontrolled stress and tension can cause similar kind of 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 all these.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.