Hi, uhm I just turned 17 this april, and I ve been feeling nauseated since march. I would have this sudden motion sickness attack just by standing. Also, around last year I woke up one morning to get ready for school, my daily routine, and I suddenly felt dizzy so I lied back down on my bed. When I though I was okay, I got up, but this time, that dizziness got worse and vision started getting brighter, I couldn t see anything. Along with that, I felt this icy hot feeling in my head only. I was sweating, but it felt cold. What is this?