Thanks for your question on Health Care Magic. 
I can understand your situation and problem. 
In my opinion, you should definitely 
consult doctor and get done ecg and 2d echo. 
Faster heart beats, 
dizziness, heaviness in chest etc are seen in heart diseases. 
So better to first rule out heart diseases.. So get done ecg and 2d echo. 
If both are normal then no need to worry for cardiac diseases. 
Sometimes 
stress and 
anxiety can cause similar symptoms. 
So 
consult psychiatrist and get done counseling 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. 
Wish you good health. Thanks.