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 first rule out heart diseases for your palpitations and left sided discomfort. So get done ecg and 2d echo. If both these are normal then no need to worry for heart diseases. No need to consult neurologist. Better to consult psychiatrist and get done counselling sessions. Try to identify stressor in your life and start working on it s solution. You will definitely improve with anxiolytic (destressor) drugs along with counselling sessions. You can continue b 12 and propranolol till you consult psychiatrist. Don t worry, you will be alright. Avoid stress and tension, be relax and calm. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.