Does chest pain that lasts a few seconds and goes away mean that a heart attack is coming or does it usually mean something else?

That is very nonspecific, so it could easily be something else. You are best to talk to and perhaps see your primary doctor who has your full history and can get the details about your current complaints.

This type of pain will be atypical for cardiac origin, majority of such pain proves to be musculoskeletal. However the possibility of concomitant heart disease and/ or having atypical pain of cardiac origin has to be ruled out, best to start with your doc.