Chest Pain. 2 years. all are normal.

I am having Chest Pain from past 15 days. Last year also I had the same pain and have undergone cardio tests like EGC, ECHO, TMT and also CT Angiography. All tests were normal. Now also I have done a ECG and TMT which are also normal. I would like to know what is causing this pain. I also have left hand pain and back pain and sometimes Breathlessness. On routine health check up I was diagnosed with High Cholesterol for which my Doctor prescribed 10mg satin which I am taking daily. I am also facing GERD issue for which also I am taking Pantocid. There is also some tenderness on the chest. Please help what is the issue I am facing as all my cardio tests are normal. I have done total 3 TMT in last 2 years. All are normal.