I am a 29 year old female, 5'11 200lbs. As long as I can remember, I would occasionally experience tightness in my chest. Today it began about an hour and a half ago, and has not gone away. I am able to perform normal duties, cooked dinner packed my sons lunch for school. I am under a lot of stress both at work and in my personal life, and am a pretty tense person. Do you think this could be caused from anxiety, or should I be worried about a heart attack?