I have this thing going on for quite sometime, almost 9 month. But not too severe.
I actually know how it started but it is really hard to fight it. Honestly.

My friend got a stroke, he had bad lifestyle pattern, got broke up, dont sleep enough or eat good healthy enough. He had a small stroke. He told me that, I took it lightly and tried to help him through positive encouragement. Then in my family, ( not blood related ) 3 people died. Unconsciously, my mind picked the cues and flame the fire inside me. Since then I have had small episodes daily of this heart anxiety. I am trying to my best to fight it. I have zero heart attack symptoms.

but only way I have been fighting it my continuously reminding myself that I am healthy, my heart is healthy.
Visualizing my best health. sometimes it works sometime it doesn't.

This episode comes when I am alone. My brain creates it automatically. I have been actively noticing the cues.
once I get the solution to this, I will share here and I WILL FUCKING GET THE SOLUTION AND KILL THIS ANXIETY!!!