Thanks for your question on Health Care Magic.
I can understand your concern.
In my opinion, you should first get done serum calcium level to rule out hypocalcemia
because this can cause similar symptoms and ecg changes.
If deficiency of calcium is there then you will need supplements.
If calcium is normal then possibility of stress
related symptoms is more.
So consult psychiatrist
and get done counselling
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. Avoid stress and tension, be relax and calm.
No need to worry for heart diseases.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.