Hi,
Thanks for query,
Heart attack may have or may not have any sign.
All typical signs of having
severe chest pain,
chest discomfort,chest distress,difficulty in breathing,
radiating pain.
One may not have only gastric upset or shoulde pain with chest distress will have heart attack.
So better keep your blood pressure normal,if diabetes keep under control,
Have your weight normal.
Avoid smoking,alcohol.
Do regular exercise.
If you have just doubt about attack,consult your doctor.
Do not become your doctor and do
self medication.
Ok and bye.