Sorry to hear you're having problems. GERD symptoms can definitely mimic heart problems right down to jaw pain.
That said, if I were you I'd definitely report the incident you describe to your doctor and see if he/she would like to do a workup on you.
That type of experience should not be ignored. Don't worry about it. Just go and discuss it with your doc and see if he/she wants to explore what's going on.
Hope it's the one and only time you have the problem!
Words of wisdom by Eckhart Tolle:
"Whatever you fight, you strengthen, and what you resist, persists.”
“Worry pretends to be necessary but serves no useful purpose”
“Accept - then act. Whatever the present moment contains, accept it as if you had chosen it. Always work with it, not against it.”