Hello. I m a 23 year old female. I just went to the gym two days ago. Yesterday in the middle of a lecture, I had a sudden pain that is very hard to pinpoint in my upper chest area. I ve been able to deduct that it is (sorta) around the right shoulder, collar bone and spreading slightly to the middle of my chest just above my breasts. I had a pain like this last week, which stayed for about three days. It finally went away until yesterday when it came back. It s been almost 24 hours now and the pain has not gotten any better. I ve noticed the pain intensifies if I am either breathing deeply, or if I lean forward on a desk as opposed to leaning back. I m not sure if I should be concerned if these are warning signs of a heart attack or not. If it helps, I was diagnosed with Lupus about a month ago.