Is it normal for your face to flush when your sick? And what do I have?

Well today at school I've been feeling a little bit dizzy but I decided to tough it out , then I got a headache. After all of that my my face went all hot and red. It felt like I got heat stroke or something. I am home now and I feel worse. When I walk im all wobbly and shaky. What do you feel like when you're at the point to faint? Someone please tell me what is wrong with me!!!