I have been having chest pain, sometimes dull, sometimes sharp in my right side (to the left of my right breast). Sometimes I feel it in my shoulder and back. I have had an EKG in the past and nothing....I also am the bill of health except for some high cholesterol like a year ago. I have changed my diet and excercised since. I am 5'-4" and 142 pounds. I look about 130 though so a lot of my weight is muscle. I lift and do cardio but the pain is progressing from once every coupl of weeks to daily. I am 31 years old. What are the possible causes or solutions? Anyone?