Hve pain in shoulder/neck/jaw and arm & down in right breast! . Hve bad tennis elbow! Do repetitive work with right side! Feels like muscle pain pector?

Pectoralis strain. Repetitive work with the right ue and body can strain the pectoralis muscle. However, other things can present with this constellation of symptoms. Would recommend evaluation by your doctor if it persists.
Abuse , body pain. Abuse of any muscte or joint by repetitive actions means damage to tissues and result is from chronic trauma traumatic mild arthritic changes will be seen in this case as trauma is for long time.Tennis elbow can get better by rest, for 3 weeks after inj of long acting cortisone etc f.Stopping abusive activities, rest to area, alternate, local balm or analgesic, local heat &cold will resolve.