How do I avoid damaging my nose while I sleep after getting a nose job?

I want a nose job, but I’m worried about damaging my nose in the months after surgery while I sleep. Even if I try sleeping on my back, I always wake up on my side or stomach with my face in the pillow. This is obviously not good to do after a nose job. I live alone, so no one could move me if I were to put my face to the pillow. How do people prevent this? Would I be able to wear a cast while I sleep for the first few months after surgery?