What Causes Chest Pain And Numbness In Lower Back?

Hi, I had an ecg done a couple weeks ago- due to chest pain, right arm pain and numbness and low back pain. It of course did not reveal anything. I am a 47 year old female and I have problems with anxiety so I think its all from anxiety. My question, I would love to have a stress test just to rule out anything. Can a stress test reveal things an ecg might not?