What S Causing Severe Neck And Muscle Pain Under The Back Shoulder Blade When There Is Neither Bone/ Nerve Issues?

I have been taking simvastatin 20mg for over 7yrs, 5yrs ago, I was feeling severe neck pain, and muscle pain under my back shoulder blade. This would happen three months or 6months at a time, I would just wake up and my neck would be stiff on the left side and severe nerve pain in my left arm, it would go away, as I see when the muscle under my back should blade the swelling is reduced. I have done MRI for the neck and seen a neck specialist, there are no bone issues, i have seen a nerve specialist no nerve issues, this leads me to a muscle swelling and pressing on the nerves. I am leaning toward the simvastatin. I would like to stop the simvastatin. I have talked with my doctor, but she just wants to treat the symptons, I want to stop the cause. Any suggestions?