feeling nauseated seems unrelated to your scoliosis
. but again you need to examine the patient to be so sure.
scoliosis sometimes do give various presentations. depending upon the extent and severity of the disease.
regarding your bladder. have you got any recent scans done? if yes can u send an image or the report to me.
also you should consult a doctor who can see you physically and examine your scoliosis and see your reports and advice you the same.