I have a pain in my solar plexus and between my shoulder blades that radiates out to my neck, shoulders and arms. right now about a 4 on pain scale.

Go to ER: If this is of sudden onset, lasting long enough for you to read this reply, go to an emergency room. Possibilities range from a gas bubble and spasm in the esophagus, to heart attack or dissecting aortic aneurysm.

Nerve Impingement: You may have a nerve impingement of your long thoracic nerve or even impingement of a nerve root or another nerve near your spinal column. This can happen from malalignment of the spine with impingement of a nerve, or even swelling of a muscle or other structure near a nerve. The 'referred pain' you are experiencing is likely related to a nerve condition.