I keep getting chest tightness on and off for many months - especially originating from the neck and upper back. If I pull my arms behind and compress my back , get pain in chest. Don't get breathlessness but at times feel chest is hurting That apart I am a smoker for 24 years...quit 2 months back ..non drinker and  never consumed smokeless tobacco . I had done 3 heart tests in 3 months..Ecg and stress test in April..2d echo last week and troponin I test 4 days back, twice . All test negative Pulmonary function test done 2 weeks back showed 85 percent lung efficiency. Do I still need to do any angiography ? Could this be cardiac or non cardiac pain. No Diabetes or blood pressure yet. Hdl and Ldl were 30 percent off normal range. Cholesterol was 188 in test done in April end 2023. I am 43 years old male Pls advise