Very sharp left side breast pain (lasts a few seconds) then area is sore and tender. This can happen when moving. I get the same pain in upper arm too?

Left side breast . Pain my advise is to see s cardiologist for evaluation and work up to make sure nothing serious is going on.
Check with your doc. This may be a heart problem. Better check with your doc to be safe.
ANGINA ? We need to know if associated with hpn then it could be angina. It is transient left chest pain with upper arm radiation. But if not with hpn and associated with lifting heavy object or exercise and tenderness on the area, it can be tritze syndrome.