welcome to HCM. as you have mention about ur prob, the desiccation means dry out of the disc between the vertebrae bones of L5 and S1...the function of disc is to act as cushion between the vertebrae bones and prevent the injury
to the spinal cord
and spinal nerves also. in your case thr s little compression of spinal cord which is creating pain. this happened after delivery of ur baby. during pregnancy
the all the ligaments and muscle becomes lax due to hormonal
secretion which is normal..but that takes time to regain normal strength aftr delivery.. so u need to consult an orthopaedic and physiotherapist.. you need proper postional training, training to handle baby, and some exrecises to get rid of pain. and u can strengthen ur back muscle...to have a happy health fit life...