Hi mam,discomfort and pain around waist area is a common symptom in many conditions.let me give you the most common causes 1)muscle strain or spasm due to abnormal posture,vertebral disc disease 2)trauma/fall unnoticed or trivial. 3)herpes zoaster or shingles. 4)uterine pathology like a retroverted uterus,pelvic inflammatory diseases(other symptoms like fever,vaginal discharge may be associated.) you can give a trial of analgesic and muscle relaxant combination therapy for 4-5 days.if the pain is muscular in origin,it subsided.if it doesn t improve,you can have an orthodontist consultation for thorough examination.analgesics recommended:ibuprofen,paracetamol(please avoid ibuprofen if any renal issues).muscle relaxants can be chlorzoxazone,thiocolchiside.hope my answer allays your anxiety and keeps you in good health.any further medical assistance if needed,please let me know.thank you.take care.bye.