I am sorry to hear that you are in so much pain. I wished I had an answer for you but, as a fitness professional, I do not have the training to help you with your problem. And I venture to guess that even a medical doctor would not make any suggestions based on your description without having seen you.
Thus, I suggest that you see a doctor. If you have pain that radiates down your arm, I would go as quickly as possible because that is one of the ‘red flags’.
I hope you will feel better soon.