Sleep suggestions?

I'm sick of not getting any sleep! I'm 32 weeks and cannot get comfortable. Went to labor and delivery at the hospital today due to some serious back pain in my mid to lower left side. Aside from having some major dehydration, they said don't favor sleeping on my left side cause it's putting weight on my kidney. It hurts when I sleep on one side too long anyways, but what options do I have to sleep? I have a body pillow, but doesn't seem like it makes a whole hell of a difference. I don't know what to do. I'm so exhausted!