Thanks, Julien. They reinforced what you just said - that just because the CT scan and EKG didn't show any problems that doesn't necessarily mean there are none. The nurse told me of a patient who came in under similar circumstances, was sent home, and had a heart attack 3 weeks later. They all stressed the importance of coming back in if I have chest pains again.
That's depressing. My last visit to the ER cost me $1500, and that was just for a single CT scan (which identified kidney stones). This time I had 2 scans + stress test and stayed overnight in the hospital. It'll be at least 2 grand. It's enough to make me want to move to Canada. Or France, or Great Britain, or Sweden or just about any other industrialized country on the planet where health care doesn't routinely bankrupt people.
Jeez, I've got more important things to spend my money on! Ozone 6 is out!