The back pain
and MRI findings do suggest lumbar spondylosis
. If there is no weakness and any major neurological deficits, I would advise strict bed rest for 15 days. Bed should be hard with minimal cushioning. Apart from that learn some back physiotherapy
exercises for building up back muscles. If that doesn't help and problem persists you may have to undergo surgery for the disc protrusion
. Some relief can also be achieved with injection in back which can be given by orthopedician or neurosurgeon.