Low heart rate but I still get slight panics at night. I’m currently on vitamin D, iron, And lexapro 
I was at the ER 2 days ago and they told me my heart was ok 
But I still fear sudden cardiac death 
Any thoughts? I’m also going to a cardiologist Monday. I have been thinking maybe I get panic because of my oxygen levels but idk how to check that and I sometimes feel like I’m about to black out and shut off and die…