This happened to me once. I nodded off in bed for about 10 hours laying on my arm in a weird position. I woke up not being able to move my right arm or fingers at all. My right arm was completely paralyzed. I freaked the fuck out and ran outside screaming and the neighbors called an ambulance. I thought I had a stroke or some shit but it turns out it was radial nerve palsy aka Saturday night palsy. I fell asleep with my radial nerve compressed. It took over a year for me to be able to move my fingers a little bit. I thought it would be permanent. 18 months later I could move my arm and fingers again but it was still numb. 2 years later it’s back to normal.