Talk to Orthopedic Surgeon on Lower Back Pain Travel To Leg

After my first delivery I got this pain which is at the lower back and travel to both legs sometime left and some time right. It got worst after my 2nd delivery. I have taken treatment. I am attaching my previous and current X-ray plz guide me what is in my recent x-ray and guide me the difference between both x-rays . Either the situation is same or not It's very important and urgent. Jazak Allah.