I have pain in the shoulder, neck and chest that gets worse when breathing. Any help appreciated?

Go to ER. Rule out a blood clot or heart issues emergently then electively evaluate the shoulder or referred sources. Common referred sources include: abdomen, heart and neck. Shoulder sources include: arthritis, labral tears, instability, tendinitis, rotator cuff tears, bursitis, painful bony spurs etc. Shoulder blade pain can be from the neck or bursitis around the blade.