I was wonder if i went to the doctor and i had a catscane done xray done blood takeing 3times..and had a ekg?

done and tey sed im fine but i just have extra heartbeat but doc sed nothing serious to worry bout bc its prob has to do with my anxitey....but anyway does this mean i dont have to worry right now about anything like cardiac arrests and heart problems for now??? i get nervus here and there but everyone says im nutts bc i did all test and im fine