Its difficult for me to comment specifically on your case, without knowing more details and results of MRI scans
In general, symptoms that occur after a lamainectomy should be evaluated in case there is instability of the joint, or the presence of a new problem, or a disc fragment still in the area of surgery. So long after surgery, it may be more likely to be instabilty of the joints around the area of surgery - surgery stabilises the site of surgery, but areas around it with similar (but milder) disease may still cause symptoms down the road depending on teh diagnosis.
It may be necessary to do an MRI to evaluate for this, but further surgery should be avoided unless there is evidence by the examination or EMG of progressive neuroloigcal function like muscle
paralysisCerebral palsy
Facial paralysis
Isolated sleep paralysis
Laryngeal nerve damage
Muscle function loss
Parkinson’s disease
Poliomyelitis or there is a retained disc fragment. Conservative therapy is ideall recceomended unless this is the case, as in most cases it resolved on its own and surgery has the potential to make things worse
Good luck