I do not have acid reflux and I do not ever have gas because I take digestive enzymes. I have taken a digestive enzyme and will wait to see if symptoms leave.
Thanks for your advice, however, my symptoms are not as severe as you suggest. I am not one to take medication - the side effects are often worse on the body than the cure.
I feel the tightness subsiding since taking the digestive enzymes. I feel a slight discomfort in my left arm. Since the tightness has subsided - I suppose I will see how if feel over the next 24 hours.