question: Hello, I am a 31 year old female, approx 130 pounds.  For the past six months I have been having constant pain on the left side of my sternum (sp?), that circles my breast both on the top and bottom.  With this I also have shortness of breath, dizziness, and headaches.  I have had several ekgs, and blood work that came back normal.  The echocardiogram showed MVP.  My doctor says it is costocondritis but I take Aleve everyday and use IcyHot at night and it doesn't seem to be helping.  Is this muscular pain or something else?  Thanks.