I literally feel your pain.

Last winter Jazz slept between my legs at the knees every night and by early March I had such bad hip pain I had to go to the doctor - to no avail. When the weather got warmer by April she quit sleeping with me and by June all my pain was gone.

Now that we have Scout she began sleeping with me a few months ago. She insist I be flat on my back and she sleeps in my right armpit with her head on my shoulder. I'm now beginning to have back pain plus I have strange dreams.

I can't take the pain so as of the last week or so I've been moving myself without disturbing her too badly and she either readjusts or leaves for a little while but always returns. Give that a try. You can't be a good cat parent if you are suffering in pain. I also put an extra throw blanket on the bed around the area Scout lays and she has gotten on it a few times and not bothered me. Thank goodness for king sized beds!