Could Significant Pain And Cervical Spine Lesions Be Causing The Slow Recovery After Rotator Cuff Surgery Post MS?

I. have.M.S.and required a surgical repair of my rotator cuff. The procedure went well. I had the surgery.I late.Auvust. I am still in rehab. I have considerable pain. I just started active exercizes, the pain can be a five or six. Because I have lesions on my cervical spine from the M.S. could that be the reason for my long recovery? P!ease I can't believe the pain.