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 better to rule out heart diseases like
arrhythmia (rhythm disturbances in heart) because you are having skipped beats and sudden onset breathlessness.
So
consult doctor and 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 heart diseases.
Sometimes uncontrolled stress and anxiety can also cause similar symptoms.
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 it's solution.
You may need anxiolytic drugs too.
Don't worry, you will be alright but first rule out heart diseases.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.