Bed too hard or not enough pillow?

My first guess would be you need a higher pillow - you want your head and neck to be in line with your spine or even slightly higher (look at any reclining Buddha statue). If that doesn't work and you suspect your bed is too hard, try a soft foam or fleece layer to top your mattress. If that doesn't work, check your shoulder position relative to your body. My experience is that most positions for the lower shoulder work fine, but maybe yours is extremely forward or backward or splat under you?