If all my emg mris test come back normal then what wrong with me ?i been limping for 5 months now and i walk with a cane i am limping on my left leg and my left knee buckling my neurologist said that my lumbar spine mri is normal i can go back to wor?

At this age, Multiple Sclerosis (MS) is a possibility and should be considered among other neurologic issues.

"Limping" is ambiguous and may be with pain, weakness, incoordination, dragging one or both legs, foot drop, etc. If focal on left and painless, might represent spinal cord lesion. Although a diagnosis may be proposed, without a thorough exam, difficult to find anatomical locus. The neurologist should be able to provide further information.