I'm confused....
You say he says it's "snm", do you know what that is?
Chest pain can be either gastrointestinal,heart related or rheumatic (bones or cartilage). If you're short of breath then it could be your lungs.
I don't know what to think of the fact that you can push on the area and the pain stops, unless it's a contracting muscle/ligament.
Can you relate the pain to eating, after eating, certain foods, sitting at the computer, (I sit weird and have developed scoliosis because of it)?