You report “Now having tingling when sitting and when lying down. Also started to see some tingling in left calf which never had”. Tingling (paresthesia) is generally not a concerning symptom. The decompressed nerve can swell somewhat late after surgery and produce tingling.
Instability is the shifting of one vertebra on another due to worn articulations and causes positional pain which would be the predominant symptom, not tingling. Try to ignore the symptoms for now and give it time to calm down.
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.