Your symptoms are aligned with foraminal stenosis (see: https://neckandback.com/conditions/radiculopathy-pinched-nerve-in-neck/). It would be highly unlikely that your old levels already fused would be causing this. With shoulder pain and certain neck tilting methods causing pain, most likely its your C4-5 level. Hopefully, an MRI will diagnose it and na injection will give you long term relief. https://neckandback.com/treatments/epidural-injections-and-selective-nerve-root-blocks-diagnostic-and-therapeutic-neck/
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.