Brief Answer:
See the description

Detailed Answer:
hello,
Whatever symptoms you have mentioned are suggestive of anxiety disorder. It a psychological condition and very common now days. There is nothing serious about it. The basic problem is person thinks too much or say negatively, and gets symptoms of anxiety without actually any anxiety provoking condition, like tremors, palpitations, numbness, shortness of breath, sometimes chest pain etc. Heart rate is normal but on a higher side, it's probably due to anxiety.
The medicine which you are prescribed are basically to calm you and control your palpitations. These can be stopped gradually. Along with this, you should try to keep yourself engaged in various activities. You should also do meditation, yoga, deep breathing exercises. Try to think less about your illness. Avoid smoking, alcohol, drugs if any.
However, once you can certainly explain your symptoms in details for re-opinion. Have you undergone any test there like hemogram, ecg, thyroid test etc. if not, you should undergo once, just to be sure.
Hope this helps you and get back if you have any doubts. All the best.

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