What would be the cause of shooting pain through your chest/shoulder blade?

It comes and goes very often, i get a very intense shooting pain through my chest, either side or both at the same time, as well as my mid-upper back and shoulder blades. It hurts to move, breathe, bend over, anything. I want to schedule an appointment but i want to know what i should get tested for, and not just another go in "idk" leave. Doc said he doesnt think its heart disease as im young and tests are oka, but never got tested for lupus.