I have left shoulder pain goes from the top to the elbow hard to teach out and reach behind my back can't fasten my bra iy hurts so bad sleeping nigh?

Rotator cuff: Your symptoms of pain @ night and pain w/ movements away from body suggest your rotator cuff is involved. Pain can be from the rot cuff getting 'pinched' underneath the point of the shoulder( impingement syndrome).Try taking a NSAID for a few days. If your pain continues see a board certified ors for examination/ x-rays . Best of luck.!