Cardiophobia. Hb is 12 angiography?

Hello respected Doctors, Greetings and New Year wishes. I am suffering from heart problem. I am 36 yrs old with weight 45 kgs and height 5.4 inch... I have run through end number of tests when I say tests it means all ... Ecg echo tmt usg all normal. I have a constant fear that I will die of a heart attack. I saw my cousin's granny passing away before my eyes two yrs ago and she was having severe chest pain and she died before my eyes. I am in fear. Coz of this my heart keeps palpitating and I find difficult to breath n dizziness with chest pain. My ecg is always normal. Once I was having palpitations I did ecg was normal with 116 bpm. I have no blood pressure problems. It's always 120/80. Or 70... I am very scared. I left my job coz of this.. P.S all my tests are negative.. No thyroid problem. KFT,lipid, vitamins, lft all normal. Seems normal. Shall I do coronary. HB is 12 angiography? Pls help.. Everyone has left me...