Justwanted to say that I took your advice and purchased a memory foam mattress topper and slept on it last night for the first time.
Although I didn't sleep well (due to things other than my pain) I didn't wake with pains in my lower back or hips just my ribs, which after adjusting my pillows to prop me up stopped for a while too.
I am now hopeful of better sleep.
Thank you all
Love and light