Although not impossible, chest pain
at rest in a 19 year old is rarely caused by obstruction in the arteries of the heart which causes a heart attack
, and other causes, such as anxiety, gastrointestinal irritation
or muscle/nerve irritation
of the chest wall are by far more common and benign. You probably want to consult a physician with experience in chest pain (eg. internist, cardiologist) and if their evaluation is benign, then you can focus more calmly on other possibilities including anxiety disorders such as panic disorder/attacks.
Dr Brenes-Salazar MD
Mayo Clinic MN