I am an 18 year old girl. Two days ago I came down with something. I have severe chills, then I'll get super hot and sweat through my clothes. I also have very painful headaches, dizziness, constapation, nausea, and severe stomach pain. I feel hungry at normal times however I take one bite of food and I instantly feel as though I am going to throw up. I would like to know what you believe is wrong with me and how I could go on to fix it. I haven't been able to leave bed in 2 days