What Causes Pain And Small Burst Of Electric Shock In Breast?

I'm a 21 yr old female who gets small bursts of electric shock in my left breast and under it. this usually lasts about a few seconds. For most i'll say about 3 seconds. I also sometimes receive pain and at times a sort of burning sensation like if cayenne or jalepeno peppers were rubbed on the spot at the centre of my chest (between my two breast). Are my nerves just acting up or is it something else?