ok, so i had my one and only panic attack, two months ago, ever since then i can always feel my heart pumping throughout my body along even though its not going quicker with, i have done heart tests which show that i am fine, so my doctor says these feelings are down to anxiety, so what i am trying to understand why is it now that if i walk up the stairs, or do anything which involves a small bit of exertion, anxiety makes me more aware of my heartbeat, has the original panic attack messed up