Hi there. Thank you for your question. I will be helping you out with your queries
Yes an MRI is essential as far as I am concerned.
I think that you should have an MRI of upper back to see if this is a problem with the discs or bones of your thoracic spine that is causing the problem.
Also, considering that you are having referred pain down your shoulder, MRI of your neck spine may also be required.
Are you with me?
Yes should be increased if it has helped you some.
You are most welcomeWish you all the best.I would appreciate it if you rate me by clicking on one of the smiley faces below.Kindest regards