Heart related. Alone. no one to care.

Pls Pls help.. I am suffering from cardiophobia.. I feel like I might get heart anytime. Weight 45 kgs. Height is 5.2. Unmarried.. My life is so frustrating now. I have lost all Hope. Initially I never felt this way. As I hear people suffering From heart diseases I start feeling so gloomy and then my chest pain starts. My limbs, hands and I start feeling breathless. I have run all tests and I don't have any life style diseases...normal bp, HB is 12.  normal tft, kft, ecg, echo, tmt, no diabetes. I feel left side chest pain, left arm, legs, jaws, head.. I don't know what's going on... It's happening since Jan 2019.. I wake up all of a sudden with heavy heart beats.. I am going to die....I live alone. No one to care. Regards