There is another thing you might consider. How do you sleep at night? I was hurting so bad between my shoulder blades and was sore on my upper back. My chiro told me to be sure to either sleep on my side or my back. I discovered that when I was on my side, with a pillow under my knee, I did ok starting out. But when I woke up in the morning I was still on my side from the waist down, but from the waist up I had rolled onto my chest. Now, I use a firm pillow that supports my knee, as well as my chest so I can't roll over. I haven't had upper pain like that for days! which is good because we thought we might have to buy a sleep number bed which is so expensive. So, for now, this method works. It's something to consider.