With your National Health Service, I understand the referral wait can be months. The good news is that there is no cord compression that you have reported- only nerve root compression. Nerves are more forgiving than the cord and the waiting time to see a surgeon can be longer. There still is some risk with waiting but the risk is much less than with cord compression.
Seizures would not be associated with nerve compression in the neck. Neck and shoulder pain more likely is related to this nerve compression. Many of the other symptoms are not related to the neck but could be related to anxiety. I am unclear what neck “graunching” is.
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.