Do you have pain to cough or sneeze? Do you have numbness anywhere?? You mentioned problems urinating....what about bowel movements??? Do you have problems stopping bowel movements or any numbness around that area?? Look up a condition called cauda equina and see if you have any of those symptoms.

Are you feeling unwell at all??

If your doctor has given you a full medical check and the cauda equina doesn't sound like you, then look in to a treatment programme for disc prolapse but do this with caution...... either see a physiotherapist for help with this OR look in to the McKenzie Institute for back care advice (you should be able to find this online)