Absolutely. As a paramedic, in a good instance of the number of SCDs I have attended where the family have said "y'know they said they just really didn't feel right/had a sense of something dark/impending doom, all day long".

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.