I am a 22 year old female, i have been feeling light headed and dizzy. My body feels very weak, and its very shaky and i feel unsteady when I walk. I have a really bad headache, which makes my eyes and ears sensitive to the light and loud noises. I got plenty of sleep the night before, and have eaten all my meals for the day, I also am keeping hydrated with plenty of water and some juice for the sugar. I laid down to get some rest with my air conditioner on, and woke up sweating and over heating. I feel back a sleep and about an hour later woke up cold and shivering. So i am unsure of whats wrong or what to do now?