Dizziness

Vanessa37

I woke up in the middle of the night to go to the bathroom and the room started to spin. I waited a little bit to go to the restroom and then when I came back and laid down the spinning was extreme and I got nauseous. I had to clutch on to my bed. Eventually I moved to the couch because being upright was better. For a few hours if I would bend over I'd get dizzy and still felt a little sick to my stomach. The nausea is gone and the dizzy took a while to go away but then has come back if I move my head the wrong way. I took the day off work because I didn't want to get into a car accident or fall over at work. What's causing this?