Does acid reflux cause heart attack like chest & back pain? I don't get the burning I just get pain even when I haven't eaten!

Heart disease. Heart attack pain can be disguised as heart burn or acid reflux or musculo-skeletal pain. Women tend to have atypical symptoms including shoulder or jaw pain sometimes back pain, shortness of breat and sometimes just fatigue. You should seek further assistance with your pcp or if you have on going pain through the er.
Could be. At 31 the chance of advanced heart desease is low but nothing to joke about. See your doctor and describe your symptoms. Help is right a phone call away.