Any unbearable chest pain should not be taken lightly. First thing you have to do is to rule out heart attack. Heart attack if diagnosed within 6 hours of the attack, can be effectively treated otherwise it can produce significant mortality. Hence you must take an ECG. In 90% of cases it can rule out heart attack. If it is not heart attack the chest pain may be due to bony pain as occurs in costo chondritis or due to acidity; they don t pose threat to life. However many times it happens that people are often mistaking heart attack as acidity, etc and taking ranitidine and they don t see the doctor immediately; this results in loss of thousands of lives. Hence i strongly suggests that you meet a doctor immediately whenever you develop pain in the chest.