i'm sorry you're experiencing this. you need to get it checked out right away. if the antacids aren't reducing the pain then it may not be caused by heartburn. angina is caused by a reduction in oxygen delivery to the heart muscle which causes pain. do not try to self-diagnose angina. you need to seek professional care as soon as possible. take care!
i have had chest pains for 4 months for last 2 weeks pain in top of left arm. have family history of angina tried ranitidine and gaviscon