Unfortunately without seeing your MRIs and the severity of the disc herniation I cannot tell you whether surgery is indicated or not
An EMG of your right arm, if not done already, would give an indication of the severity of pinched nerves from the disc. This may help you in your decision making. A pinched C5 root can cause pain in the scapular, and shoulder area along with weakness of movement around the shoulder, and possibly flexion of the elbow.
Your other shoulder tissue problems may be complicating the clinical picture, but an EMG is specific for a nerve problem.
Certainly if the EMG is abnormal in that area, surgery should be considered.
Good luck