Do I??? Understatement of the past say oooh 4 months or so (I'm just over 7 months along now). I sleep with a pillow between my knees, one under the belly slightly and one behind my back and one under my top arm (to keep my shoulders open). It makes rolling over and repositioning rather entertaining for my DH to watch me do
The chiropractor adjusts my hips on a regular basis (1 / wk or 1 / biwkly) + we just splurged on a new bed - Tempur Pedic - which is AMAZING and as soon as it's done airing out I'm sure will be a major help.
I've slept on every surface in the house and found the softer the better. All in all I've heard it's just going to be there until after the birth. Your hips and pelvis start loosening up for that baby and won't go back to normal until your hormones tell them to