Hi, I'm A 49 Year Old Male. I Have Had

Hi, I'm a 49 year old male. I have had a back injury approximately 6 years ago from that was a bulging disk at L4 L5. From this it became degenerative disc disease with narrowing l4l5. I noticed leg pain is server and numbness on toes. What can be done? My Dr told me that no surgery is needed and the pain is all from my brain.