Chest and back pain. To the pain.

Hi, From the last one and half month, I am experiencing pain in my chest, back, shoulder and neck. The pain is not muscle pain, but related to pulse. The duration of such pain is of few seconds or sometimes of a minute. Also, the pain is caused when I sit in particular position, but when I straighten myself, the pain disappears. My ecg is normal, blood sugar is 113, blood pressure is 126/80, weight is 63 (normal as compared to my height). The above tests and measurements are normal, but I am still experiencing such light pain from the last one and half month. Also like to add that I have no respiratory issue as I do yoga and exercise for half an hour daily, but I never experienced any respiratory problem. Can you please suggest solution to the pain. Thanks