[kqr]

I feel you. I occasionally get fairly strong palpitations that can last up to a minute in the worst cases (they seem to come in spells during various times of my life), and it does really feel awful. The first period it happened I got some bad hypochondria. (And I was thoroughly checked up multiple times. Nothing detectably wrong.)

I'm more used to it now, but the sense of doom still passes right through all my reasoning layers.

[rootinier]

Yup. Hypochondria is what they told me as well. But in my opinion, most of the doctors don't experience this on their own, they read it in books and studies. That's why they often can't really help you.