I am only 18 years old and the other day I woke up and stood up quickly to turn off my ceiling fan. I got very bad head rush, it felt like I was frozen or in a weird dream. Everything went black for at least 20 seconds and I was very dizzy. During this time I felt really funny and it almost felt like I was sleeping standing up. When i opened my eyes my vision was still bad, but for about 10 seonds I forgot everything; where I was, who I was, what I was doing, everything. I was still frozen and dizzy when this happened. Then it came back all of a sudden. Is this normal!?!?