I have a pregnancy pillow and 3 other pillows I sleep with. The last few days have just been miserable.
I feel your pain... Everytime I get up for toilet I can hardly walk... I feel like I am 95 years old hehehe :)
Try a nice fluffy pillow between your legs while laying on your side. Also, surround your body with pillows.
If that doesn't work, there are body balms you can put on that REALLY help!
Maybe a body pillow will help? I saw a special pillows for mums-to-be on the net.