New symptoms of hypertension and tachycardia are most likely not related to your neck. Those symptoms can be related to pain but not to cord compression.
Did you inform the surgeon of numbness in the hands and legs as well as intermittent “heaviness or weakness of the legs”? These can be symptoms of myelopathy (see section on myelopathy on the website).
Another opinion by a good spine surgeon might be very helpful to you.
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.