stretching for someone with 1 working hip!

I had my right hip fused as a child. It doesn't function at all. I use my pelvis to walk on my right side. My lower back gets really really tight when walking. There are lots of exercises I can't do either because of my hip.. I need stretches that work for me but everytime I look up stretching most involve your hips. If anyone has any advice It would be so appreciated!