For about a month I have been having heartburn. Never before. It hurts in my back, jaw and chest. Today it will not go away. Pinching coming & going.

See a doctor. Your symptoms sound concerning i would recommend getting an urgent medical evaluation.
Go to the ER. Although at your age cardiac problems would be unlikely, the symptoms you describe are concerning. If would suggest going to the ER today, there are tests they can do to determine the etiology.