I'm approaching my 6 year anniversary after a lumpectomy and nodes removed. Still have breast pain from the surgery in both areas, and my surgeon says it will probably continue. Sometimes it's a little nagging pain (on a scale of 1-10, probably a 3) - just enough to annoy me and can happen several times a day and last a few days. Sometimes it's a sharp pain that just lasts a second or two. It's always in the same area of my surgery, so I can tell it's not deep in my chest. I was told if I didn't have any shortness of breath with this pain, that it's probably surgery related.
I think when we reach a certain age, any pain in the chest can be a little frightening. Glad you checked it out.