Thanks for choosing health care magic for posting your query.
From the description that you have given it is very clear that you are probably suffering from some kind of anxiety
disorder which is a psychological condition.
Coming to your specific question:
1- why I m feeling with that ?
ans: Its cause of the imbalance in your neuro-chemicals in your brain.
2- how can I overcome that ?
Ans:You need either medications or psychological help.
3- which specialist can treat this case mentioned above ?
Ans: A psychiatrist
can take care of this condition.
Hope I have answered your query. I will be more than happy to help you if you need any further clarifications.
In case if you want to discuss with me directly you can use the link:
Wish you a good health!