I Have Shoulder Pain That Radiates Down My Arm. Have

I have shoulder pain that radiates down my arm. Have been told I have a rotar cuff injury but it seems to be getting worst. Pain down my arm is getting worst. Seems to hurt more because my arm is almost always in a bent position even when I sleep.
Also hurts alot when I am carrying something heavy. My whole arm aches. Feels almost like I torn something or pulled something out of socket.