Significant narrowing of the disc space might be 'normal' but there is nothing normal about getting a nerve trapped in these narrow disc spaces. Ask for a referral to a neurologist.
I am not sure what "normal" means age 48. I am 57 and my MRI results are not consistent with yours.
The question is why did you have the MRI? Are you experiencing pain, discomfort or minor aches?
Whether you pursue and consult with another doctor ( e.g. spinal doctor) depends upon your daily symptons.
Good Luck
Better Consult an ortho/neuro specialist having success rate in treating infectious diseases.