Thanks for your question on Health Care Magic.
I can understand your situation and problem.
By your history and description, possibility of
stress and
anxiety related symptoms is more.
But better to rule out cardiac diseases. So get done ecg first. If ecg is normal than no need to worry for cardiac disease.
You are mostly having anxiety.
Better to
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.
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.