Hi, i used to have little left breast discharge when pressed since 3-4 months it was thin now it has become thick. Left breast is heavy than right. I had mrsa infection in same breast treated by needle aspiration & antibiotics before 6 months. I have neck pain on left , pain between shoulders & back pain & feel heavy breathing on left side only, breast pain isnt there. Should i do prolactin test ? Does breast changes leads to muscle pain or tightness ?