Even though I am new here I can relate to what you are saying. It's tough when you are suffering from anxiety which presents physical symtpoms which makes hypochondria worse. It's a never ending circle since one causes the other and you never know where it all begins and ends. I too have had some very pronounced physical ailements similar to what you have (chest pains,body aches,headaches,shortness of breath, etc.) I also have had full body exams (CT Scan, MRI, ultrasounds,EKG,x rays) and all have come back normal yet it is so hard for me to accept that I am fine. i have no reason to believe I am sick yet I can't shake this feeling. I am now coming to grips with my hypochondria and trying to learn to cope with this all. You could very well have anxiety. It sounds similar to what so many of us are going through.