Lower back and leg pain?

I'm not sure if this is the right place to post my question and I apologize if it isn't. Ever since my pregnancy, which was 3 years ago, I developed lower lumbar pain and now, pain is starting in the back of my upper leg which is affecting my walking... What should I do?

I did have an MRI done on my back right after my pregnancy and they said I had a compressed spine. Could that be the cause of my leg issues?