Hello, im new to the group. I was diagnosed with costochondritis a few months ago (ive had it before) I was prescribed anti-inflammatories which did not work. I had a resting ecg done which was normal. My health anxiety is sky high at the moment as I cant get it out of my head that its my heart. Everyday I wake up anxious, many panic attacks and lots of checking The doctor has booked me in for an exercise ecg for reassurance. Can anyone tell me what an exercise ecg is like, im really unfit and overweight.