I am 24 years old. Sudden I feel something like pressure from stomach area to chest and shoulders and very fast heart beat, sometimes it comes down withing few minutes but sometimes it comes normal after an hour, i visits emergency many times, perform ECG everytime it came normal sometimes they said i have only tachycardia due to anxiety or panic attack and suggest me for echocardiography that was normal in 2015.
But now since one year, whenever i do exercise or running i feel same symptoms like panic attacks except one new symptom i feel sudden like my heart stop or missing breath during exercise, now it come very worse, 2 months ago i perform ETT that was also normal and during ETT nothing happens with me but in home when i pickup some small weight and climbs stairs same situation happens with me. My thyroid and electrolyte test was also normal. I am very depressed now what i do. Doctors said i only have heart anxiety and nothing more. but why i feel that symptoms when i not anxious