My bed was a land of pillows I had a wedge pillow under my bump, a v-pillow between my knees and 2 pillows along my back - generally I couldn't roll over but if I did then the pillows behind me just made sure I wasn't completely flat.
That's what my bed was like too! There wasn't much room left for DH, he was thrilled about it

In all seriousness though, all the pillows really helped with comfort more than anything but also kept me on my side which helped with all my back and hip pains.