Cant feel my leg

Patient: My name is justin im 20 years old and have been having alot of back trouble lately pain in the lower back i have also had knee surgery on my left knee two years ago tn i was laying in bed and began losing feeling in my left leg i tried to stand up and couldn’t i am worried what this could be i have recently had an mri and am on a 6 month waiting list to see a neurosurgeon the doctor has told me i also have arthritis in my back and knee