Chest pain on the left side. Wrong?

Hi All, For the last 6 months I've been troubled by chest pain on the left side which sometimes radiates into shoulder and till the elbow. Tingling numbness into the fingers too sometimes. No previous medical history. Always tried to keep lifestyle as healthy as possible. Because of this issue I've been to ER once, had multiple ECGs, TMT, 2D Echo, CT Chest, CT Coronary Angio, CT Cervical Spine, Xray Cspine and Chest. All other reports are normal except for some disc bulges on cervical spine. My question is why does it affect the chest so much. If it's cervical spine related, why is the neck stiffness minimal compared to magnitude of chest pain. It leaves me in a lot of discomfort. Is there anything else that I can do in terms of daignosis? Is there any other test left to identify what's going wrong? Because pain can't happen just like that.