I have found it very hard to find the right pillow combinations for fibromyalgia - how to find one soft enough not to aggravate my neck, but supporting enough to not cause any new problems. I have come to the conclusion that there isn't one straight answer, so now have a collection of pillows by the side of the bed. The Tempur Millenium Pillow available for a around £70 on Amazon
Here is the rolls royce solution, but if you cant splash out to that extent, then there are lots of shapes of memory pillow around for much less these days, which can be made that bit softer by a feather or down topping. I found some of the Dunelm Mill ones to be the best, and bought this lovely
V shaped Memory Pillow for £30 where it has made my corner of the sofa into a cosy haven for listening to my ipod touch while knitting to keep my hands working. Here hoping you find your solution, and can relax in comfort.