Kindly consider taking therapy for a long term management of your concern.

Feeling ur own heartbeat alone will not be sufficient to make a diagnosis..  Ur symptoms need to be evaluated in detail.. They can be treated accordingly..

Dear mam, it looks like anxiety disorder. It happens due to chemical imbalance in your brain. It can be cured by taking some tablets and vitamins. Kindly consult with me on practo.

Anxiety ( unknown fear, uneasiness etc symptoms ) occurs due to neurochemical imbalance . These symptoms are more common in your age group ( 20 to 35 yrs). It includes palpitation ( being aware of own heartbeat, wet palm soles, trouble in  falling a sleep , uneasiness , shortness of breath , tightness in chest , dry mouth etc As u described your cardiac profile sounds normal so in your case these symptoms are because of anxiety ( psycholigical stress ) 

It is due to generalised anxiety disorder kindly consult for treatment