<s>[INST] I am having strong pain in the centre of my chest, which is making it difficult for me to breathe in and out.I am slowly feeling it come inmy neck. I have exercised much. It has been over an hour. I ruled out the possibility of heart attack coz I am only 22 year old female. Please help let me know why is this pain? [/INST] Hello, I suggest you go to the hospital and do some examinations like some routine blood tests, ECG, cardiac sonography and a chest X-ray. These are needed to exclude any serious disease. And only after excluding this, it may be due to gastroesophageal reflux or muscle pain. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr Anila Skenderi, General & Family Physician </s>