I had this happened to me like 3 straight days in a row. Every time I slept and soon as my eyes open the room felt like it was spinning for like 10secs. It didn't matter if it was at night or doing the day taking a nap. I started dreading waking up it got so bad. I went to the emergency room and they said I was severely dehydrated. I got a couple bags of fluid and everything was back to normal.