Heart attack fear. I overcome from this?

Still date, I took 8 ecg, 2 echo, 2 tmt, 2 chest xray, thyroid, sugar test.. all test were negative and normal.. Despite all reports were normal, i am living with heart attack.. wherever pain happened in body i related only with heart problem.. All these problem started after the covid pandamic, i am in work from scenario, there is lot what if questions in my mind.. Faced 10-15 times heart palpitation, it make the more fear to me.. even small muscle pain make to think heart attack.. What should i do? How will I overcome from this? What if I really have any heart problem. Note: My last echo is 10 mnth back - 100% normal My last TMT is 10 month back - 100% normal My last ECG 20 days back - Doctor said normal ECG.