What Causes Discomfort And Pain In The Chest?

Mild Coronary artery disease moorthy123 Hi. I am 47 years old male. For the past 15 months I am suffering with chest discomfort, pain, pain in arm neck.Starting from ECg and up to treadmill tests were done stage by stage . all test reports were normal. Tread mill - 13.15 mts and negative result.But as the pain continued Dr. prescribed Nebulet 2.5 mg and later increased to nebulet 5 mg. I am a controlled diabatic for the past 10 years. As there was no improvement in the pain , Dr advised tocarried out CT angio and the result was negative with 0 value. As the symptom continued , DR advised for angiogram. 15 days before Angiogram was done. The result is like LMCA:Normal LMCA divides in to LAD and LCX, LAD: Is a Type 1 calcifictortuous vessel and shows mild diffuse mid LAD disease withmyocardialbridging, mild diagonal disease. LCx: Is a non dominant vessel, LCx and OMs are normal RCA: Is a dominant vesseland shows minor proximaldisease. PDA and PLV are normal Impression ; Mild Coranary artery disease. But now the Dr to continue only the Nebulet and nothing more. My pain continues and last week I am also getting cough. Totally confused . Please advise