hi all, ive recently has my panic attacks under control by taking medication (Lexapro 5mg daily). last week while i was doing a quite challenging upper body weight workout, i felt my heart have this electric zaps. i completely stopped working out after with the fear that it might be heart related. 

also a little background, i did an ECG test a little about a month ago and the cardiologist said it was all clear. 

now i have this mild discomfort on my left shoulder blade area and i cant help but think it might be heart related :( but i really do think its anxiety related as well. im relatively healthy &amp; fit, i work out at least 3 times a week for 60 minutes.