Hi,i think you r much worried about your problem. now just relax! Are u having history of hypertension
or diabetis . If no such history, ECG, TMT and 2 D ECHO are normal then possibility is that there is nothing wrong with you !
,sudden fear of unkown thing , worrinying excessively, at times disturbed sleep or incomplete sleep, all these are symptoms of anxiety
disorder.It needs expert treatment from psychiatrist
who will treat you with some anxiolytic medicine and councelling.if you wish i can definitely help you out as i am psychiarist with experince of five years.