Ok..For about a month and a half i have been experiencing pain in the left side of my chest (localized..somewhat sharp pain). Also pain sometimes down my left arm (sometimes like muscle pain..sometimes like joint pain) and shoulder..I am 23 years old...Don't smoke, don't drink..I have an athletic build...I have had 2EKGs, both normal ( i have an usual BP around 11.5-6 and HR of 54-62) and also I had my heart checked by a cardiologist (the doc said there's no sign of any trouble with my heart). Could it be spine problems? ..or something else? My blood tests were also perfect.