Gretel. Sorry your back is still bothering you. Mine bothered me quite a bit with all the laying/sitting.
I would get concerned about whether it would improve as lower back pain and sciatica was my main complaint prior to diagnosis.
I have just intermittent days of back pain now...most likely from work related activities.
We may still have some work to do, I'm considering chiropractor but it does seem to get less and less as I walk better.
Work on keeping those hips get well, as you can walk more, and side sleep...may ease more and more. That was close to 4 months out for me really.