Chest pain. anxiety. Heart attack now!

Hlo sir/ Mam. Am 21 year old male I have noticed whenever I go under extreme stress I start feeling chest pain and also left arm pain... it will peak for 30/40 mints and than slow down but still stay for 3-4 hours easily Like once I got in an argument in train which led to severe chest n abdomen discomfort for which I was rushed to ER ( ekg n trop okay) I have been dealing with ocd so I do experience stress frequently when I am exposed to my triggers- contamination... I went to cardio last month who did ecg, echo, tmt, lipids n when everything was normal he referred to psychologist. Am taking treatment since than but there's no improvement in this chest pain issue. Regarding left arm I do feel some muscle tension in left joint shoulder I have developed a fear of going into heart attack now