Living with heart attack fear. Die.

Read fully, urgent advise need. 2 years before i started to fear about corona virus during my work from home scenario.. and it's finally converted into heart attack fear.. one day suddenly i got heart palpitation with lot of fear and feel like iam going to die. Suddenly i rushed to the hospital and take ecg and it's normal. From that time to still, I experienced 7-8 times heart palpitation (lightheadness with dizziness - but not severe, mild only). Whenever happened this i taken heart related test and it's normal report. In last 1.5 years i have taken 6 ecg, 2 echo, 2 tmt, 2 chest xray, 1 thyroid, 2 lipid profile test. All reports were normal, LDL is borderline. Doctor advised me to nothing to worry, you don't have any heart problem now. Despite visited more than 10 doctor and all the heart test were normal, I still living with heart attack fear.. Even little changes happened in my body i thinking it's heart problem and iam going to die..😭😭😭