Pain in center of my chest. Of few!

From last 2 year I have on and off pain in the centre of my chest some time I felt on left side of chest near arm pit it's a sharp pain I felt this may be of heart disease so I done my TMT and CT coronary scan and all required blood tests to rule out heart disease and all came normal But still I fell that pain suddenly and any time accompanied with headaches My symtoms are as follows 1 Pain in center of chest 2 some time I can feel it when I touch some time I cant 3 feel pain with deep breath, cough or sneeze sometime 4 pain move to backside  some times 5 sometime when I sleep on my left side then even suddenly sharp pain starts and go after some time Please suggest me what should I do met many doctors but unable to get rid of my chest pain ALL THESE ABOVE SYMPTOMS NEVER HAPPEN TOGETHER BUT IN COMBINATION OF FEW