It might feel like pressure or squeezing, rather than pain. The feeling of discomfort may come and go, as well. People deny to themselves that they're having a heart attack. No one wants to be having a heart attack. They may hope they're only having heartburn, or simple muscle strain.
Some people are embarrassed.
Others worry if their insurance company will cover. It is always better to be safe than sorry. People have not prepared to cope with this kind of emergency. When a heart attack begins, the first response for many people is fear. Planning now could save lives.