In case anybody was wondering, I was eventually taken into the ER. They started me on morphine and was in surgery a few hours later.
I mean, it literally can take your heart going 400 beats a minute, stop it, and instantly start going 72. It feels fucking crazy but I never have time to feel "doom" specifically.
I do know that the paramedics love administering it though haha.
In the setting of chest or upper abdominal pain or pressure, especially over 35 years, any pain that radiates to shoulder or jaw, especially that cannot be relieved and doesn't appear exertion-related (but even then) should be considered something serious until shown otherwise, in general, and coupled with the above.
She had been in failing health, was around 90 years old, had recently gone through a rough fight with cancer, a broken leg from a fall, and had just been in a nursing home temporarily. She fought with everyone to be allowed to go home and die, she didn't want to die in the nursing home. She went home and died a few days later.
She very clearly knew.
"Impending sense of doom" is a symptom of a heart attack.
This is called Cardiophobia.
What made it worse was the doc in the ER did an ultrasound on my heart as I was coming down from my freak-out. I was thinking “wow, that’s amazing! That’s my heart inside of me!” Then the doctor says, “this side of your heart looks a little thick but otherwise it looks fine” and never followed up. I try not to think about that too much.
One of the most frightening experiences of my life at the time, but it was super interesting in retrospect.
In retrospect I also have kind of similar feelings about it, although I'm afraid the experience actually caused me being worried a lot more about some minor health issues in the last year.
https://en.wikipedia.org/wiki/Angor_animi
Apparently, you have to take these signs seriously when it's not a fear of death, but actually saying, "I'm dying".
Look on reddit for "when people know they're dying"...