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.
Dr. Corenman